CVE-2021-33780
published 2021-07-14CVE-2021-33780: Windows DNS Server Remote Code Execution Vulnerability
high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
Windows DNS Server Remote Code Execution Vulnerability
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.0.0 < 6.1.7601.25661 | 6.1.7601.25661 |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.0 < 6.1.7601.25661 | 6.1.7601.25661 |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.0 < 6.0.6003.21167 | 6.0.6003.21167 |
| microsoft | windows_server_2012 | >= 6.2.0 < 6.2.9200.23409 | 6.2.9200.23409 |
| microsoft | windows_server_2012_r2 | >= 6.3.0 < 6.3.9600.20069 | 6.3.9600.20069 |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | >= 10.0.0 < 10.0.14393.4530 | 10.0.14393.4530 |
| microsoft | windows_server_2019 | >= 10.0.0 < 10.0.17763.2061 | 10.0.17763.2061 |
| microsoft | windows_server_version_2004 | >= 10.0.0 < 10.0.19041.1110 | 10.0.19041.1110 |
| microsoft | windows_server_version_20h2 | >= 10.0.0 < 10.0.19042.1110 | 10.0.19042.1110 |
| msrc | windows_server_2008_for_32-bit_systems_service_pack_2 | — | — |
| msrc | windows_server_2008_for_x64-based_systems_service_pack_2 | — | — |
| msrc | windows_server_2008_r2_for_x64-based_systems_service_pack_1 | — | — |
| msrc | windows_server_2012 | — | — |
| msrc | windows_server_2012_r2 | — | — |
| msrc | windows_server_2016 | — | — |
| msrc | windows_server_2019 | — | — |
| msrc | windows_server_version_2004 | — | — |
| msrc | windows_server_version_20h2 | — | — |
Microsoft
Windows DNS Server Remote Code Execution Vulnerability
vendor_msrc·2021-07-13·CVSS 8.8
CVE-2021-33780 [HIGH] Windows DNS Server Remote Code Execution Vulnerability
Windows DNS Server Remote Code Execution Vulnerability
FAQ: If my server is not configured to be a DNS server, it is vulnerable?
No, this vulnerability is only exploitable if the server is configured to be a DNS server.
Role: DNS Server: Role: DNS Server
Microsoft: Microsoft
Impact: Remote Code Execution
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely;Older Software Release:Exploitation More Likely;DOS:N/A
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5004244
Reference: https://support.microsoft.com/help/5004244
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5004237
Reference: https://support.microsoft.com/help/5004237
Reference: https://catalog.update.microsoft.com/v7/site/Sear
GHSA
GHSA-c54c-p933-mmrc: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-33780, CVE-2021-34525
ghsa_unreviewed·2022-05-24·CVSS 8.0
CVE-2021-34494 [HIGH] GHSA-c54c-p933-mmrc: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-33780, CVE-2021-34525
Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-33780, CVE-2021-34525.
GHSA
GHSA-3m64-v24q-w9wr: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33754, CVE-2021-33780, CVE-2021-34494, CVE-2021-34525
ghsa_unreviewed·2022-05-24·CVSS 8.0
CVE-2021-33746 [HIGH] GHSA-3m64-v24q-w9wr: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33754, CVE-2021-33780, CVE-2021-34494, CVE-2021-34525
Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33754, CVE-2021-33780, CVE-2021-34494, CVE-2021-34525.
GHSA
GHSA-86w3-hm4v-hj7x: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33780, CVE-2021-34494, CVE-2021-34525
ghsa_unreviewed·2022-05-24·CVSS 8.0
CVE-2021-33754 [HIGH] GHSA-86w3-hm4v-hj7x: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33780, CVE-2021-34494, CVE-2021-34525
Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33780, CVE-2021-34494, CVE-2021-34525.
GHSA
GHSA-5jx6-vwcr-r4rq: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-33780, CVE-2021-34494
ghsa_unreviewed·2022-05-24·CVSS 8.0
CVE-2021-34525 [HIGH] GHSA-5jx6-vwcr-r4rq: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-33780, CVE-2021-34494
Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-33780, CVE-2021-34494.
GHSA
GHSA-x7wh-c3qc-hfx3: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-34494, CVE-2021-34525
ghsa_unreviewed·2022-05-24·CVSS 8.0
CVE-2021-33780 [HIGH] GHSA-x7wh-c3qc-hfx3: Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-34494, CVE-2021-34525
Windows DNS Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-33746, CVE-2021-33754, CVE-2021-34494, CVE-2021-34525.
No detection rules found.
No public exploits indexed.
Talos
Microsoft Patch Tuesday for July 2021 — Snort rules and prominent vulnerabilities
blogs_talos·2021-07-13·CVSS 6.8
[MEDIUM] Microsoft Patch Tuesday for July 2021 — Snort rules and prominent vulnerabilities
By Jon Munshaw, with contributions from Jaeson Schultz.
Microsoft released its monthly security update Tuesday, disclosing 117 vulnerabilities across its suite of products, by far the most in a month this year. Today’s Patch Tuesday includes three vulnerabilities that Microsoft states are being exploited in the wild, which we will cover in more detail.
There are 13 critical vulnerabilities patched in this month, and there is one low- and moderate-severity vulnerability each. The remainder are considered “important.”
Most notably, Microsoft has released an update to patch the “PrintNightmare” vulnerability in its print spooler function that could allow an attacker to execute remote code. This vulnerability was first disclosed in April, though security researchers later discovered it coul
Qualys
Microsoft and Adobe Patch Tuesday (July 2021) – Microsoft 117 Vulnerabilities with 13 Critical, Adobe 26 Vulnerabilities | Qualys
blogs_qualys·2021-07-13·CVSS 7.8
CVE-2021-34448 [HIGH] Microsoft and Adobe Patch Tuesday (July 2021) – Microsoft 117 Vulnerabilities with 13 Critical, Adobe 26 Vulnerabilities | Qualys
### Microsoft Patch Tuesday – July 2021
Microsoft patched 117 vulnerabilities in their July 2021 Patch Tuesday release, and 13 of them are rated as critical severity.
### Critical Microsoft Vulnerabilities Patched
CVE-2021-34448 – Scripting Engine Memory Corruption Vulnerability
This is being actively exploited. The vulnerability allows an attacker to execute malicious code on a compromised website if a user browses to a specially crafted file on the website. The vendor has assigned a CVSSv3 base score of 6.8 and should be prioritized for patching.
CVE-2021-34494 – Windows DNS Server Remote Code Execution Vulnerability
Microsoft released patches addressing a critical RCE vulnerability in Windows DNS Server (CVE-2021-34494). This CVE has a high likelihood of exploitability and is assi
Tenable
Microsoft’s July 2021 Patch Tuesday Includes 116 CVEs (CVE-2021-31979, CVE-2021-33771)
blogs_tenable·2021-07-13·CVSS 7.8
[HIGH] Microsoft’s July 2021 Patch Tuesday Includes 116 CVEs (CVE-2021-31979, CVE-2021-33771)
## 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
Talos
Microsoft Patch Tuesday for July 2021 — Snort rules and prominent vulnerabilities
blogs_talos·2021-07-13·CVSS 6.8
[MEDIUM] Microsoft Patch Tuesday for July 2021 — Snort rules and prominent vulnerabilities
## Microsoft Patch Tuesday for July 2021 — Snort rules and prominent vulnerabilities
By Jon Munshaw, with contributions from Jaeson Schultz.
Microsoft released its monthly security update Tuesday, disclosing 117 vulnerabilities across its suite of products, by far the most in a month this year. Today’s Patch Tuesday includes three vulnerabilities that Microsoft states are being exploited in the wild, which we will cover in more detail.
There are 13 critical vulnerabilities patched in this month, and there is one low- and moderate-severity vulnerability each. The remainder are considered “important.”
Most notably, Microsoft has released an update to patch the “PrintNightmare” vulnerability in its print spooler function that could allow an attacker to execute remote code. This vulnerabil
Qualys
Microsoft and Adobe Patch Tuesday (July 2021) – Microsoft 117 Vulnerabilities with 13 Critical, Adobe 26 Vulnerabilities
blogs_qualys·2021-07-13·CVSS 7.8
CVE-2021-34448 [HIGH] Microsoft and Adobe Patch Tuesday (July 2021) – Microsoft 117 Vulnerabilities with 13 Critical, Adobe 26 Vulnerabilities
## Microsoft Patch Tuesday – July 2021
Microsoft patched 117 vulnerabilities in their July 2021 Patch Tuesday release, and 13 of them are rated as critical severity.
## Critical Microsoft Vulnerabilities Patched
CVE-2021-34448 – Scripting Engine Memory Corruption Vulnerability
This is being actively exploited. The vulnerability allows an attacker to execute malicious code on a compromised website if a user browses to a specially crafted file on the website. The vendor has assigned a CVSSv3 base score of 6.8 and should be prioritized for patching.
CVE-2021-34494 – Windows DNS Server Remote Code Execution Vulnerability
Microsoft released patches addressing a critical RCE vulnerability in Windows DNS Server (CVE-2021-34494). This CVE has a high likelihood of exploitability and is assign
Crowdstrike
July 2021 Patch Tuesday: Updates and Analysis
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] July 2021 Patch Tuesday: Updates and Analysis
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand AT
Crowdstrike
July 2021 Patch Tuesday: Updates and Analysis
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] July 2021 Patch Tuesday: Updates and Analysis
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand ATT&CK in 10 Minutes or Less [VI
2021-07-14
Published