CVE-2019-18935
published 2019-12-11CVE-2019-18935: Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when…
PriorityP198critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
KEVITWEXPLOITRansomwareInitial access
CISA Known Exploited Vulnerabilitydue 2022-05-03
Exploited in the wild
EPSS
99.74%
100.0th percentile
Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| telerik | ui_for_asp.net_ajax | 2011.1.315 – 2020.1.114 | — |
Detection & IOCsextracted from sources · hover to see the quote
command"C:\Windows\system32\reg.exe" query "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions" /s↗
- →MSHTA spawning network connections to retrieve .hta payloads is a strong indicator of post-exploitation activity following Telerik deserialization RCE; alert on mshta.exe making outbound HTTP connections. ↗
- →RingQ loader uses .NET mixed-mode assemblies with embedded native C++ code to evade .NET analysis tools; standard dnSpy/ILSpy analysis will show empty managed code — use native debugger to inspect unmanaged entry points. ↗
- →Tunneling/reverse proxy tools (Fuso, FRP) deployed post-exploitation to expose NAT-protected servers; detect unusual outbound persistent TCP connections from IIS servers to external IPs on non-standard ports. ↗
- →ASPX .NET web shells deployed on Telerik servers after CVE-2019-18935 exploitation; monitor for new .aspx file creation in web root directories by w3wp.exe. ↗
- →CVE-2019-18935 accounted for 8% of all exploitation attempts recorded by Fortinet IPS sensors in H2 2024, indicating active, widespread scanning and exploitation in the wild. ↗
- ·The deserialization exploit is only possible when encryption keys are known (e.g., via CVE-2017-11317 or CVE-2017-11357); patching or rotating keys breaks the exploit chain. ↗
- ·As of version 2020.1.114, a default setting prevents exploitation; in 2019.3.1023 a non-default setting can prevent exploitation, but earlier versions have no such protection. ↗
- ·The vulnerability is particularly dangerous because many ASP.NET applications may run older versions of Telerik UI, leaving victims exposed even if the applications themselves are patched. ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vulncheck9.8CRITICAL
cisa9.8CRITICAL
vendor_oracle8.8CRITICAL
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GHSA
GHSA-c655-3j45-33xw: Progress Telerik UI for ASP
ghsa_unreviewed·2022-05-24·CVSS 9.8
CVE-2019-18935 [CRITICAL] CWE-502 GHSA-c655-3j45-33xw: Progress Telerik UI for ASP
Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (In 2019.3.1023 but not earlier versions, a non-default setting can prevent exploitation.)
VulnCheck
Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
vulncheck·2019·CVSS 9.8
CVE-2019-18935 [CRITICAL] CWE-502 Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
Progress Telerik UI for ASP.NET AJAX contains a deserialization of untrusted data vulnerability through RadAsyncUpload which leads to code execution on the server in the context of the w3wp.exe process.
Affected: Progress Telerik UI for ASP.NET AJAX
Required Action: Apply updates per vendor instructions.
Known Ransomware Campaign Use: Known
Exploitation References: https://redcanary.com/blog/blue-mockingbird-cryptominer/; https://lifars.com/knowledge-center/xmrig-based-coinminer-bluemockingbird-group/; https://www.telerik.com/blogs/blue-mockingbird-vulnerability-telerik-guidance; https://blog.talosintelligence.com/2020/09/CTIR-quarterly-trends-Q4-2020.html; https://www.hhs.gov/sites/default/files/netw
Oracle
Oracle Oracle Health Sciences Applications Risk Matrix: Core (Telerik UI for ASP.NET AJAX) — CVE-2019-18935
vendor_oracle·2023-04-15·CVSS 8.8
CVE-2019-18935 [CRITICAL] Oracle Oracle Health Sciences Applications Risk Matrix: Core (Telerik UI for ASP.NET AJAX) — CVE-2019-18935
Oracle Oracle Health Sciences Applications Risk Matrix: Core (Telerik UI for ASP.NET AJAX) vulnerability
CVE: CVE-2019-18935
CVSS: 8.8
Protocol: HTTP
Remote exploit: No
Affected versions: Network
Advisory: cpuapr2023 (APR 2023)
CISA
Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
cisa·2021-11-03·CVSS 9.8
CVE-2019-18935 [CRITICAL] CWE-502 Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
Vulnerability: Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
Affected: Progress Telerik UI for ASP.NET AJAX
Progress Telerik UI for ASP.NET AJAX contains a deserialization of untrusted data vulnerability through RadAsyncUpload which leads to code execution on the server in the context of the w3wp.exe process.
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2019-18935
Remediation Due Date: 2022-05-03
CISA ICS
Hitachi ABB Power Grids eSOMS Telerik
cisa_ics·2021-03-18·CVSS 9.8
[CRITICAL] Hitachi ABB Power Grids eSOMS Telerik
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Hitachi ABB Power Grids eSOMS Telerik
Last RevisedMarch 18, 2021
Alert CodeICSA-21-077-03
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low skill level to exploit
- Vendor: Hitachi ABB Power Grids
- Equipment: eSOMS Telerik
- Vulnerabilities: Path Traversal, Deserialization of Untrusted Data, Improper Input Validation, Inadequate Encryption Strength, Insufficiently Protected Credentials, Path Traversal
## 2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to upload malicious files to the server, discover se
Suricata
ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M1
suricata·2020-03-30·CVSS 9.8
CVE-2019-18935 [CRITICAL] ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M1
ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M1
Rule: alert http $EXTERNAL_NET any -> any any (msg:"ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/Telerik.Web.UI.WebResource.axd"; fast_pattern; content:"type=rau"; nocase; distance:0; http.request_body; content:"rauPostData"; nocase; reference:url,github.com/noperator/CVE-2019-18935; reference:cve,2019-18935; classtype:web-application-attack; sid:2029761; rev:3; metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_03_30, cve CVE_2019_18935, deployment Perimeter, confidence Medium, signature_severity Minor, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 202
Suricata
ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M2
suricata·2020-03-30·CVSS 9.8
CVE-2019-18935 [CRITICAL] ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M2
ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M2
Rule: alert http $EXTERNAL_NET any -> any any (msg:"ET EXPLOIT Possible Telerik UI CVE-2019-18935 File Upload Attempt M2"; http.method; content:"GET"; http.uri; content:"/Telerik.Web.UI.WebResource.axd?dp="; fast_pattern; reference:url,www.exploit-db.com/exploits/43874; classtype:web-application-attack; sid:2029762; rev:2; metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_03_30, cve CVE_2019_18935, deployment Perimeter, confidence Medium, signature_severity Minor, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_10;)
Exploit-DB
Telerik UI - Remote Code Execution via Insecure Deserialization
exploitdb·2019-12-18·CVSS 9.8
CVE-2019-18935 [CRITICAL] Telerik UI - Remote Code Execution via Insecure Deserialization
Telerik UI - Remote Code Execution via Insecure Deserialization
---
See the full write-up at Bishop Fox, CVE-2019-18935: https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui, for a complete walkthrough of vulnerability and exploit details for this issue (along with patching instructions).
Install
git clone https://github.com/noperator/CVE-2019-18935.git && cd CVE-2019-18935
python3 -m venv env
source env/bin/activate
pip3 install -r requirements.txt
Requirements
This exploit leverages encryption logic from RAU_crypto. The RAUCipher class within RAU_crypto.py depends on PyCryptodome, a drop-in replacement for the dead PyCrypto module. PyCryptodome and PyCrypto create problems when installed in the same environment, so the best way to satisfy this depend
Metasploit
Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization
metasploit·CVSS 9.8
CVE-2019-18935 [CRITICAL] Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization
Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization
This module exploits the .NET deserialization vulnerability within the RadAsyncUpload (RAU) component of Telerik UI ASP.NET AJAX that is identified as CVE-2019-18935. In order to do so the module must upload a mixed mode .NET assembly DLL which is then loaded through the deserialization flaw. Uploading the file requires knowledge of the cryptographic keys used by RAU. The default values used by this module are related to CVE-2017-11317, which once patched randomizes these keys. It is also necessary to know the version of Telerik UI ASP.NET that is running. This version number is in the format YYYY.#(.###)? where YYYY is the year of the release (e.g. '2020.3.915').
Tenable
GFI Archiver v15.7 Multiple vulnerabilities
blogs_tenable·2025-06-10
GFI Archiver v15.7 Multiple vulnerabilities
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Fortinet
Key Takeaways from the 2025 Global Threat Landscape Report | FortiGuard Labs
blogs_fortinet·2025-04-28
Key Takeaways from the 2025 Global Threat Landscape Report | FortiGuard Labs
FORTIGUARD LABS THREAT RESEARCH
Key Takeaways from the 2025 Global Threat Landscape Report
FORTIGUARD SECURITY PORTFOLIO 2025 THREAT LANDSCAPE REPORT
By Douglas Jose Pereira dos Santos | April 28, 2025
In 2024, the FortiGuard Labs team observed a decisive shift in the threat landscape: Attackers are compressing the time between reconnaissance and compromise, and the window for defenders to respond is narrowing to days, sometimes hours.
The 2025 Global Threat Landscape Report draws on telemetry from Fortinet’s global sensor network and threat intelligence from FortiGuard Labs to deliver a clear message: the adversary advantage is accelerating. And unless organizations change how they measure and manage risk, the gap will continue to widen.
2025 Global Threat Landscape Report
Use this r
Unit42
Silent Skimmer Gets Loud (Again)
blogs_unit42·2024-11-07·CVSS 9.8
[CRITICAL] Silent Skimmer Gets Loud (Again)
## Executive Summary
In late May 2024, Unit 42 researchers observed an adversary compromising multiple web servers to gain access to the environment of a multinational organization headquartered in North America. Based on overlaps in adversary infrastructure and tools, as well as tactics, techniques and procedures (TTPs), it’s possible to attribute the activity identified to the same threat actor behind the Silent Skimmer campaign.
In September 2023, an online payment scraping campaign was uncovered and dubbed Silent Skimmer. Since then, there has been little to no news of Silent Skimmer – until now.
According to our research, the financially motivated threat actor behind the Silent Skimmer campaign is targeting organizations that host or create payment infrastructure and gateways. Unit
Unit42
Silent Skimmer Gets Loud (Again)
blogs_unit42·2024-11-07·CVSS 9.8
CVE-2017-11317 [CRITICAL] Silent Skimmer Gets Loud (Again)
## Silent Skimmer Gets Loud (Again)
Veronika Senderovych
Chema Garcia
Zack Fink
Published: November 7, 2024
Cybercrime
Threat Actor Groups
Threat Research
C++
CL-CRI-0941
CVE-2017-11317
CVE-2019-18935
GodPotato
Python
Remote Code Execution
Reverse shells
RingQ loader
Silent Skimmer
Telerik UI
## Executive Summary
In late May 2024, Unit 42 researchers observed an adversary compromising multiple web servers to gain access to the environment of a multinational organization headquartered in North America. Based on overlaps in adversary infrastructure and tools, as well as tactics, techniques and procedures (TTPs), it’s possible to attribute the activity identified to the same threat actor behind the Silent Skimmer campaign.
In September 2023, an online payment scraping
Bleepingcomputer
Progress warns of critical RCE bug in Telerik Report Server
blogs_bleepingcomputer·2024-07-25·CVSS 9.9
CVE-2024-6327 [CRITICAL] Progress warns of critical RCE bug in Telerik Report Server
## Progress warns of critical RCE bug in Telerik Report Server
## Sergiu Gatlan
Progress Software has warned customers to patch a critical remote code execution security flaw in the Telerik Report Server that can be used to compromise vulnerable devices.
As a server-based reporting platform, Telerik Report Server provides centralized storage for reports and the tools needed to create, deploy, deliver, and manage them across an organization.
Tracked as CVE-2024-6327 , the vulnerability is due to a deserialization of untrusted data weakness that attackers can exploit to gain remote code execution on unpatched servers.
The vulnerability impacts Report Server 2024 Q2 (10.1.24.514) and earlier and was patched in version 2024 Q2 (10.1.24.709) .
"Updating to Report Server 2024 Q2 (10.1.24.7
Tenable
CVE-2024-4358, CVE-2024-1800: Exploit Code Available for Critical Exploit Chain in Progress Telerik Report Server
blogs_tenable·2024-06-04·CVSS 9.9
[CRITICAL] CVE-2024-4358, CVE-2024-1800: Exploit Code Available for Critical Exploit Chain in Progress Telerik Report Server
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Trendmicro
Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
blogs_trendmicro·2023-09-18
Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
Malware
## Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
While monitoring Earth Lusca, we discovered an intriguing, encrypted file on the threat actor's server — a Linux-based malware, which appears to originate from the open-source Windows backdoor Trochilus, which we've dubbed SprySOCKS due to its swift behavior and SOCKS implementation.
By: Joseph C Chen 2023/09/18 Read time: ( words)
Save to Folio
In early 2021, we published a research paper discussing the operation of a China-linked threat actor we tracked as Earth Lusca . Since our initial research, the group has remained active and has even extended its operations, targeting countries around the world during the first half of 2023.
While monitoring the group, we managed to obtain an interestin
Trendmicro
Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
blogs_trendmicro·2023-09-18
Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
Malware
# Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
While monitoring Earth Lusca, we discovered an intriguing, encrypted file on the threat actor's server — a Linux-based malware, which appears to originate from the open-source Windows backdoor Trochilus, which we've dubbed SprySOCKS due to its swift behavior and SOCKS implementation.
By: Joseph C Chen
2023/09/18
Read time: ( words)
Save to Folio
In early 2021, we published a research paper discussing the operation of a China-linked threat actor we tracked as Earth Lusca. Since our initial research, the group has remained active and has even extended its operations, targeting countries around the world during the first half of 2023.
While monitoring the group, we managed to obtain an interesting
Trendmicro
Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
blogs_trendmicro·2023-09-18
Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
Malware
## Earth Lusca Employs New Linux Backdoor, Uses Cobalt Strike for Lateral Movement
While monitoring Earth Lusca, we discovered an intriguing, encrypted file on the threat actor's server — a Linux-based malware, which appears to originate from the open-source Windows backdoor Trochilus, which we've dubbed SprySOCKS due to its swift behavior and SOCKS implementation.
By: Joseph C Chen Sep 18, 2023 Read time: ( words)
Save to Folio
In early 2021, we published a research paper discussing the operation of a China-linked threat actor we tracked as Earth Lusca . Since our initial research, the group has remained active and has even extended its operations, targeting countries around the world during the first half of 2023.
While monitoring the group, we managed to obtain an interest
Tenable
Cybersecurity Snapshot: ChatGPT-like Tools Will Boost Developers’ Speed – and Amplify Cyber Risk
blogs_tenable·2023-07-07
Cybersecurity Snapshot: ChatGPT-like Tools Will Boost Developers’ Speed – and Amplify Cyber Risk
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Tenable
Cybersecurity Snapshot: CISA Pinpoints Vulnerabilities in Critical Infrastructure Orgs that Ransomware Groups Could Exploit
blogs_tenable·2023-03-17
Cybersecurity Snapshot: CISA Pinpoints Vulnerabilities in Critical Infrastructure Orgs that Ransomware Groups Could Exploit
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Sentinelone
NetWalker
blogs_sentinelone·2022-11-30
NetWalker
How It Works The Singularity XDR Difference
Singularity Marketplace One-Click Integrations to Unlock the Power of XDR
Pricing & Packaging Comparisons and Guidance at a Glance
Purple AI Accelerate SecOps with Generative AI
Singularity Hyperautomation Easily Automate Security Processes
AI-SIEM The AI SIEM for the Autonomous SOC
Singularity Data Lake AI-Powered, Unified Data Lake
Singularity Data Lake for Log Analytics Seamlessly Ingest Data from On-Prem, Cloud or Hybrid Environments
Singularity Endpoint Autonomous Prevention, Detection, and Response
Singularity XDR Native & Open Protection, Detection, and Response
Singularity RemoteOps Forensics Orchestrate Forensics at Scale
Singularity
Threat Intelligence Comprehensive Adversary Intelligence
Singularity Vulnerability Management
Tenable
One Year Later: What Can We Learn from Zerologon?
blogs_tenable·2021-08-11
One Year Later: What Can We Learn from Zerologon?
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Qualys
CISA Alert: Top Routinely Exploited Vulnerabilities | Qualys
blogs_qualys·2021-07-29·CVSS 10.0
[CRITICAL] CISA Alert: Top Routinely Exploited Vulnerabilities | Qualys
#### Table of Contents
- Top Routinely Exploited Vulnerabilities
- Detect CISAs Top Routinely Exploited Vulnerabilities using Qualys VMDR
- Recommendations
- Remediation and Mitigation
- Get Started Now
On July 28, 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a cybersecurity advisory detailing the top 30 publicly known vulnerabilities that have been routinely exploited by cyber threat actors in 2020 and 2021. Organizations are advised to prioritize and apply patches or workarounds for these vulnerabilities as soon as possible.
The advisory states, “If an organization is unable to update all software shortly after a patch is released, prioritize implementing patches for CVEs that are already known to be exploited or that would be accessible to the large
Qualys
CISA Alert: Top Routinely Exploited Vulnerabilities
blogs_qualys·2021-07-29·CVSS 9.1
[CRITICAL] CISA Alert: Top Routinely Exploited Vulnerabilities
## Table of Contents
Top Routinely Exploited Vulnerabilities
Detect CISAs Top Routinely Exploited Vulnerabilities using Qualys VMDR
Recommendations
Remediation and Mitigation
Get Started Now
On July 28, 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a cybersecurity advisory detailing the top 30 publicly known vulnerabilities that have been routinely exploited by cyber threat actors in 2020 and 2021. Organizations are advised to prioritize and apply patches or workarounds for these vulnerabilities as soon as possible.
The advisory states, “If an organization is unable to update all software shortly after a patch is released, prioritize implementing patches for CVEs that are already known to be exploited or that would be accessible to the largest numbe
Talos
Quarterly Report: Incident Response trends from Spring 2021
blogs_talos·2021-06-10·CVSS 9.1
CVE-2021-26855 [CRITICAL] Quarterly Report: Incident Response trends from Spring 2021
## Quarterly Report: Incident Response trends from Spring 2021
By David Liebenberg and Caitlin Huey .
While the security community made a great effort to warn users of the exploitation of several Microsoft Exchange Server zero-day vulnerabilities , it was still the biggest threat Cisco Talos Incident Response (CTIR) saw this past quarter. These vulnerabilities, tracked as CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065, comprised around 35 percent of all incidents investigated.
This shows that when a vulnerability is recently disclosed, severe, and widespread, CTIR will often see a corresponding rise in engagements in which the vulnerabilities in question are involved. Thankfully, the majority of these incidents involved scanning and not post-compromise behavior, such
Talos
Quarterly Report: Incident Response trends from Spring 2021
blogs_talos·2021-06-10·CVSS 9.1
CVE-2021-26855 [CRITICAL] Quarterly Report: Incident Response trends from Spring 2021
By David Liebenberg and Caitlin Huey.
While the security community made a great effort to warn users of the exploitation of several Microsoft Exchange Server zero-day vulnerabilities, it was still the biggest threat Cisco Talos Incident Response (CTIR) saw this past quarter. These vulnerabilities, tracked as CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065, comprised around 35 percent of all incidents investigated.
This shows that when a vulnerability is recently disclosed, severe, and widespread, CTIR will often see a corresponding rise in engagements in which the vulnerabilities in question are involved. Thankfully, the majority of these incidents involved scanning and not post-compromise behavior, such as file encryption or evidence of exfiltration.
While CTIR’s focu
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Cyberbedrohungen
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabili
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Cyber Threats
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay 2021/04/28 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilities
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Minacce cyber
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilitie
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Ciberamenazas
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilitie
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Cyber Threats
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilitie
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Cyber Threats
# How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay
2021/04/28
Read time: ( words)
Save to Folio
Photo credit: pxhere
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands o
Talos
Quarterly Report: Incident Response trends from Winter 2020-21
blogs_talos·2021-03-24
Quarterly Report: Incident Response trends from Winter 2020-21
For the seventh quarter in a row, Cisco Talos Incident Response (CTIR) observed ransomware dominating the threat landscape. The top variants were Ryuk and Vatet, which is notable given the absence of Ryuk last quarter. We also observed variants of Egregor and WastedLocker continuing to target organizations across the globe.
Unlike last quarter, however, these ransomware attacks overwhelmingly relied on phishes delivering commodity trojan maldocs, such as Zloader, BazarLoader and IcedID. Nearly 70 percent of ransomware attacks relied on commodity trojans this quarter. Adversaries also employ commercially available tools such as Cobalt Strike, open-source post-exploitation tools like Bloodhound, and native tools on the victim’s system, such as PowerShell. For a broader breakdown of these tr
Talos
Quarterly Report: Incident Response trends from Winter 2020-21
blogs_talos·2021-03-24
Quarterly Report: Incident Response trends from Winter 2020-21
## Quarterly Report: Incident Response trends from Winter 2020-21
For the seventh quarter in a row, Cisco Talos Incident Response (CTIR) observed ransomware dominating the threat landscape. The top variants were Ryuk and Vatet, which is notable given the absence of Ryuk last quarter . We also observed variants of Egregor and WastedLocker continuing to target organizations across the globe.
Unlike last quarter, however, these ransomware attacks overwhelmingly relied on phishes delivering commodity trojan maldocs, such as Zloader, BazarLoader and IcedID . Nearly 70 percent of ransomware attacks relied on commodity trojans this quarter. Adversaries also employ commercially available tools such as Cobalt Strike, open-source post-exploitation tools like Bloodhound, and native tools on the vic
Tenable
Government Agencies Warn of State-Sponsored Actors Exploiting Publicly Known Vulnerabilities
blogs_tenable·2020-10-23
Government Agencies Warn of State-Sponsored Actors Exploiting Publicly Known Vulnerabilities
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Qualys
NSA Alert: Chinese State-Sponsored Actors Exploit Known Vulnerabilities | Qualys
blogs_qualys·2020-10-22·CVSS 9.8
CVE-2020-15505 [CRITICAL] NSA Alert: Chinese State-Sponsored Actors Exploit Known Vulnerabilities | Qualys
#### Table of Contents
- Detect 25 Publicly Known Vulnerabilities using VMDR
Update November 25, 2020: The UK National Cyber Security Centre alerts that APT nation-state groups and cybercriminals are exploiting MobileIron RCE vulnerability (CVE-2020-15505).
Original post: On October 20, 2020, the United States National Security Agency (NSA) released a cybersecurity advisory on Chinese state-sponsored malicious cyber activity. The NSA alert provided a list of 25 publicly known vulnerabilities that are known to be recently leveraged by cyber actors for various hacking operations.
“Since these techniques include exploitation of publicly known vulnerabilities, it is critical that network defenders prioritize patching and
mitigation efforts,” said the NSA advisory. It also recommended “crit
Qualys
NSA Alert: Chinese State-Sponsored Actors Exploit Known Vulnerabilities
blogs_qualys·2020-10-22·CVSS 10.0
CVE-2020-15505 [CRITICAL] NSA Alert: Chinese State-Sponsored Actors Exploit Known Vulnerabilities
## Table of Contents
Detect 25 Publicly Known Vulnerabilities using VMDR
Update November 25, 2020 : The UK National Cyber Security Centre alerts that APT nation-state groups and cybercriminals are exploiting MobileIron RCE vulnerability (CVE-2020-15505).
Original post : On October 20, 2020, the United States National Security Agency (NSA) released a cybersecurity advisory on Chinese state-sponsored malicious cyber activity. The NSA alert provided a list of 25 publicly known vulnerabilities that are known to be recently leveraged by cyber actors for various hacking operations.
“Since these techniques include exploitation of publicly known vulnerabilities, it is critical that network defenders prioritize patching and mitigation efforts,” said the NSA advisory. It also recommended “critic
Talos
Quarterly Report: Incident Response trends in Summer 2020
blogs_talos·2020-09-01
Quarterly Report: Incident Response trends in Summer 2020
By David Liebenberg and Caitlin Huey.
For the fifth quarter in a row, Cisco Talos Incident Response (CTIR) observed ransomware dominating the threat landscape. Infections involved a wide variety of malware families including Ryuk, Maze, LockBit, and Netwalker, among others. In a continuation of trends observed in last quarter’s report, these ransomware attacks have relied much less on commodity trojans such as Emotet and Trickbot. Interestingly, 66 percent of all ransomware attacks this quarter involved red-teaming framework Cobalt Strike, suggesting that ransomware actors are increasingly relying on the tool as they abandon commodity trojans. We continued to see ransomware actors engage in data exfiltration and even observed the new cartel formed by Maze and other ransomware operations i
Talos
Quarterly Report: Incident Response trends in Summer 2020
blogs_talos·2020-09-01
Quarterly Report: Incident Response trends in Summer 2020
## Quarterly Report: Incident Response trends in Summer 2020
By David Liebenberg and Caitlin Huey .
For the fifth quarter in a row, Cisco Talos Incident Response (CTIR) observed ransomware dominating the threat landscape. Infections involved a wide variety of malware families including Ryuk, Maze, LockBit, and Netwalker, among others. In a continuation of trends observed in last quarter’s report , these ransomware attacks have relied much less on commodity trojans such as Emotet and Trickbot. Interestingly, 66 percent of all ransomware attacks this quarter involved red-teaming framework Cobalt Strike , suggesting that ransomware actors are increasingly relying on the tool as they abandon commodity trojans. We continued to see ransomware actors engage in data exfiltration and even observe
Tenable
Copy-Paste Compromises: Threat Actors Target Telerik UI, Citrix, and SharePoint Vulnerabilities (CVE-2019-18935)
blogs_tenable·2020-07-22·CVSS 9.8
[CRITICAL] Copy-Paste Compromises: Threat Actors Target Telerik UI, Citrix, and SharePoint Vulnerabilities (CVE-2019-18935)
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Zscaler
Targeted attacks on Australian Networks | Zscaler Blog
blogs_zscaler·2020-06-18·CVSS 9.8
[CRITICAL] Targeted attacks on Australian Networks | Zscaler Blog
Provide users with seamless, secure, reliable access to applications and data.
Build and run secure cloud apps, enable zero trust cloud connectivity, and protect workloads from data center to cloud.
Provide zero trust connectivity for IoT and OT devices and secure remote access to OT systems.
Provide zero trust site-to-site connectivity and reliable access to B2B apps for partners.
Industry Report
Zscaler: A Leader in the 2025 Gartner® Magic Quadrant™ for Security Service Edge (SSE)
USE CASES
INDUSTRY & MARKET SOLUTIONS
PARTNERS
TECHNOLOGY PARTNERS
Resource Center
Events & Trainings
Security Research & Services
Tools
Community & Support
CXO REVOLUTIONARIES
Amplifying the voices of real-world digital and zero trust pioneers
Discover how it began and where it’s going
Meet o
Sentinelone
NetWalker
blogs_sentinelone·CVSS 10.0
[CRITICAL] NetWalker
# NetWalker Ransomware: In-Depth Analysis, Detection, Mitigation, and Removal
## Summary of NetWalker Ransomware
NetWalker ransomware, also known as Mailto, was first seen in mid-2019. It started out as a private service, but eventually switched to a Ransomware-as-a-Service model, which made it more accessible. During the pandemic, NetWalker was especially known for targeting medical and healthcare facilities. It also uses double extortion tactics, asking for payment for a decryptor as well as a promise not to release any stolen data.
## What Does NetWalker Ransomware Target?
NetWalker ransomware has impacted a wide range of victims, including companies, municipalities, hospitals, law enforcement, emergency services, school districts, colleges, and universities. The healthcare sector h
Threat Intel
Blue Mockingbird (Blue Mockingbird)
threat_intel·CVSS 9.8
[CRITICAL] Blue Mockingbird (Blue Mockingbird)
# Threat Actor Profile: Blue Mockingbird
ATT&CK ID: G0108
Also known as: Blue Mockingbird
## Overview
Blue Mockingbird is a cluster of observed activity involving Monero cryptocurrency-mining payloads in dynamic-link library (DLL) form on Windows systems. The earliest observed Blue Mockingbird tools were created in December 2019.(Citation: RedCanary Mockingbird May 2020)
## Techniques (TTPs)
### Resource Development
- T1588.002 Tool
Usage: Blue Mockingbird has obtained and used tools such as Mimikatz.(Citation: RedCanary Mockingbird May 2020)
### Initial Access
- T1190 Exploit Public-Facing Application
Usage: Blue Mockingbird has gained initial access by exploiting CVE-2019-18935, a vulnerability within Telerik UI for ASP.NET AJAX.(Citation: RedCanary Mockingbird May 2020)
### Executi
HackerOne
Remote Code Execution via Insecure Deserialization in Telerik UI (CVE-2019-18935)
hackerone·2021-06-03·CVSS 9.8
CVE-2019-18935 [CRITICAL] Remote Code Execution via Insecure Deserialization in Telerik UI (CVE-2019-18935)
Remote Code Execution via Insecure Deserialization in Telerik UI (CVE-2019-18935)
**Description:**
https://██████/██████████/Telerik.Web.UI.WebResource.axd?type=rau is vulnerable to CVE-2017-11317 and CVE-2019-18935, allowing an attacker to upload arbitrary files and gain remote code execution on the underlying system.
## References
https://labs.bishopfox.com/tech-blog/cve-2019-18935-remote-code-execution-in-telerik-ui
## Impact
An attacker can execute code on the vulnerable server, allowing an attacker to gain a foothold and exfiltrate data. Depending on the security posture of the underlying system, an attacker may be able to escalate privileges or laterally move to other systems within the network using this access.
## System Host(s)
████
## Affected Product(s) and Version(s)
Tele
HackerOne
Remote Code Execution via CVE-2019-18935
hackerone·2020-08-13·CVSS 9.8
CVE-2019-18935 [CRITICAL] Remote Code Execution via CVE-2019-18935
Remote Code Execution via CVE-2019-18935
**Summary:**
The website at https://█████████/apps/XTRAHome/Telerik.Web.UI.WebResource.axd?type=rau is vulnerable to CVE-2017-11317 and CVE-2019-18935, allowing an attacker to upload arbitrary files and gain remote code execution on the underlying system.
## Step-by-step Reproduction Instructions
1. Browse to https://█████/apps/XTRAHome/Telerik.Web.UI.WebResource.axd?type=rau. You will see the following message confirming that the file upload handler is registered:
`{ "message" : "RadAsyncUpload handler is registered succesfully, however, it may not be accessed directly." }`
2. From here on out I used the write-up at https://labs.bishopfox.com/tech-blog/cve-2019-18935-remote-code-execution-in-telerik-ui for reference.
3. With a slight modificatio
HackerOne
Remote Code Execution via Insecure Deserialization in Telerik UI
hackerone·2020-05-07·CVSS 9.8
CVE-2017-11317 [CRITICAL] Remote Code Execution via Insecure Deserialization in Telerik UI
Remote Code Execution via Insecure Deserialization in Telerik UI
Hello,
I found an outdated version of Telerik Web UI (v2016.2.607.40) at the following URL: https://███/Telerik.Web.UI.WebResource.axd?type=rau.
This means that we can achieve full RCE by chaining two different CVEs: CVE-2017-11317, which allows us to upload arbitrary files on the server, and CVE-2019-18935, which is a deserialization vulnerability.
First of all, the only thing that I tried to prove that I had successfully achieved code execution was making the server sleep for 10 seconds.
No data was compromised.
Steps to reproduce
The steps that I followed are thoroughly described in this blog post: .
Here's a quick summary:
- Download the files in the attachments
- Make sure you have pycryptodome installed (pip3 install
http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.htmlhttp://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.htmlhttps://codewhitesec.blogspot.com/2019/02/telerik-revisited.htmlhttps://github.com/bao7uo/RAU_cryptohttps://github.com/noperator/CVE-2019-18935https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-uihttps://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserializationhttps://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29https://www.telerik.com/support/whats-new/release-historyhttp://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.htmlhttp://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.htmlhttps://codewhitesec.blogspot.com/2019/02/telerik-revisited.htmlhttps://github.com/bao7uo/RAU_cryptohttps://github.com/noperator/CVE-2019-18935https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-uihttps://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserializationhttps://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29https://www.telerik.com/support/whats-new/release-historyhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935
2019-12-11
Published
2021-11-03
Added to CISA KEV
Exploited in the wild