CVE-2023-36563
published 2023-10-10CVE-2023-36563: Microsoft WordPad Information Disclosure Vulnerability
PriorityP274medium5.5CVSS 3.1
AVLACLPRNUIRSUCHINAN
KEVITW
CISA Known Exploited Vulnerabilitydue 2023-10-31
Exploited in the wild
EPSS
20.72%
97.2th percentile
Microsoft WordPad Information Disclosure Vulnerability
Affected
41 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1507 | < 10.0.10240.20232 | 10.0.10240.20232 |
| microsoft | windows_10_1607 | < 10.0.14393.6351 | 10.0.14393.6351 |
| microsoft | windows_10_1809 | < 10.0.17763.4974 | 10.0.17763.4974 |
| microsoft | windows_10_21h2 | < 10.0.19041.3570 | 10.0.19041.3570 |
| microsoft | windows_10_22h2 | < 10.0.19045.3570 | 10.0.19045.3570 |
| microsoft | windows_10_version_1507 | >= 10.0.10240.0 < 10.0.10240.20232 | 10.0.10240.20232 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.6351 | 10.0.14393.6351 |
| microsoft | windows_10_version_1809 | >= 10.0.0 < 10.0.17763.4974 | 10.0.17763.4974 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.4974 | 10.0.17763.4974 |
| microsoft | windows_10_version_21h2 | >= 10.0.19043.0 < 10.0.19041.3570 | 10.0.19041.3570 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.3570 | 10.0.19045.3570 |
| microsoft | windows_11_21h2 | < 10.0.22000.2538 | 10.0.22000.2538 |
| microsoft | windows_11_22h2 | < 10.0.22621.2428 | 10.0.22621.2428 |
| microsoft | windows_11_version_21h2 | >= 10.0.0 < 10.0.22000.2538 | 10.0.22000.2538 |
| microsoft | windows_11_version_22h2 | >= 10.0.22621.0 < 10.0.22621.2428 | 10.0.22621.2428 |
| microsoft | windows_server_2008 | — | — |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.7601.0 < 6.1.7601.26769 | 6.1.7601.26769 |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.6003.0 < 6.0.6003.22317 | 6.0.6003.22317 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.9200.0 < 6.2.9200.24523 | 6.2.9200.24523 |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.21620 | 6.3.9600.21620 |
| microsoft | windows_server_2016 | < 10.0.14393.6351 | 10.0.14393.6351 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.6351 | 10.0.14393.6351 |
| microsoft | windows_server_2019 | < 10.0.17763.4974 | 10.0.17763.4974 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.4974 | 10.0.17763.4974 |
Detection & IOCsextracted from sources · hover to see the quote
- →CVE-2023-36563 exploits Microsoft WordPad to disclose NTLM hashes; monitor for outbound NTLM authentication attempts triggered by opening a WordPad document, which may indicate credential theft in progress. ↗
- →The attack requires a user to open a malicious file delivered by the attacker; detect suspicious WordPad (wordpad.exe) process launches originating from email attachments or downloaded files. ↗
- →CVE-2023-36563 has been confirmed as actively exploited in the wild; prioritize detection and hunting on endpoints running affected WordPad versions. ↗
- ·This is an information disclosure vulnerability (NTLM hash leakage), not a remote code execution bug; exploitation requires user interaction — the victim must open a malicious file sent by the attacker. ↗
- ·The vulnerability is confirmed exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities catalog with a remediation due date of 2023-10-31. ↗
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vulncheck6.5MEDIUM
cisa5.5MEDIUM
vendor_msrc6.5MEDIUM
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GHSA
GHSA-gp6r-cxxr-fc5f: Microsoft WordPad Information Disclosure Vulnerability
ghsa_unreviewed·2023-10-10
CVE-2023-36563 [MEDIUM] CWE-20 GHSA-gp6r-cxxr-fc5f: Microsoft WordPad Information Disclosure Vulnerability
Microsoft WordPad Information Disclosure Vulnerability
VulnCheck
Microsoft WordPad Information Disclosure Vulnerability
vulncheck·2023·CVSS 6.5
CVE-2023-36563 [MEDIUM] CWE-20 Microsoft WordPad Information Disclosure Vulnerability
Microsoft WordPad Information Disclosure Vulnerability
Microsoft WordPad contains an unspecified vulnerability that allows for information disclosure.
Affected: Microsoft WordPad
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Exploitation References: https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2023-Oct; https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36563; https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json; https://www.microsoft.com/en-us/security/blog/2025/04/09/stopping-attacks-against-on-premises-exchange-server-and-sharepoint-server-with-amsi/
Remediation Due: 2023-10-31
Microsoft
Microsoft WordPad Information Disclosure Vulnerability
vendor_msrc·2023-10-10·CVSS 6.5
CVE-2023-36563 [MEDIUM] CWE-20 Microsoft WordPad Information Disclosure Vulnerability
Microsoft WordPad Information Disclosure Vulnerability
FAQ: According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
An attacker must send the user a malicious file and convince them to open it.
FAQ: What type of information could be disclosed by this vulnerability?
Exploiting this vulnerability could allow the disclosure of NTLM hashes.
Microsoft WordPad: Microsoft WordPad
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Information Disclosure
Exploit Status: Publicly Disclosed:Yes;Exploited:Yes;Latest Software Release:Exploitation Detected;DOS:N/A
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5031361
Reference: https://support.microsoft.com/help/5031361
Reference: https://catalog.update.mi
CISA
Microsoft WordPad Information Disclosure Vulnerability
cisa·2023-10-10·CVSS 5.5
CVE-2023-36563 [MEDIUM] CWE-20 Microsoft WordPad Information Disclosure Vulnerability
Vulnerability: Microsoft WordPad Information Disclosure Vulnerability
Affected: Microsoft WordPad
Microsoft WordPad contains an unspecified vulnerability that allows for information disclosure.
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-36563; https://nvd.nist.gov/vuln/detail/CVE-2023-36563
Remediation Due Date: 2023-10-31
No detection rules found.
No public exploits indexed.
Checkpoint
16th October – Threat Intelligence Report
blogs_checkpoint·2023-10-16
CVE-2023-38545 16th October – Threat Intelligence Report
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## 16th October – Threat Intelligence Report
For the latest discoveries in cyber research for the week of 9th October, please download our Threat_Intelligence Bulletin .
TOP ATTACKS AND BREACHES
LockBit ransomware gang has claimed responsibility for an alleged attack on the multibillion-dollar IT products and services reseller CDW. The gang has demanded $80M ransom and threatened to release stolen data, said to include employee badges, audits, commission payout data and more. The company has isolated the affected
Talos
Microsoft patches 12 critical vulnerabilities, nine of which are in Layer 2 Tunneling Protocol
blogs_talos·2023-10-11·CVSS 9.1
CVE-2023-36563 [CRITICAL] Microsoft patches 12 critical vulnerabilities, nine of which are in Layer 2 Tunneling Protocol
Microsoft disclosed 104 vulnerabilities in its extensive range of software and services, the most in a single Patch Tuesday since July.
What is most notable is that this batch of vulnerabilities includes 12 that are considered “critical,” nine of which are remote code execution vulnerabilities in the Layer 2 Tunneling Protocol.
Two other vulnerabilities that Microsoft is fixing Tuesday — CVE-2023-36563 in Microsoft WordPad and CVE-2023-41763 in the Skype communication platform — have already been publicly exploited in the wild and have proof-of-concept code available, making it more likely that attackers will try to exploit unpatched versions of these pieces of software. However, these issues are only considered “important.”
The nine Layer 2 Tunneling Protocol vulnerabilities all requir
Talos
Microsoft patches 12 critical vulnerabilities, nine of which are in Layer 2 Tunneling Protocol
blogs_talos·2023-10-11·CVSS 9.1
[CRITICAL] Microsoft patches 12 critical vulnerabilities, nine of which are in Layer 2 Tunneling Protocol
## Microsoft patches 12 critical vulnerabilities, nine of which are in Layer 2 Tunneling Protocol
Microsoft disclosed 104 vulnerabilities in its extensive range of software and services, the most in a single Patch Tuesday since July.
What is most notable is that this batch of vulnerabilities includes 12 that are considered “critical,” nine of which are remote code execution vulnerabilities in the Layer 2 Tunneling Protocol.
Two other vulnerabilities that Microsoft is fixing Tuesday — CVE-2023-36563 in Microsoft WordPad and CVE-2023-41763 in the Skype communication platform — have already been publicly exploited in the wild and have proof-of-concept code available, making it more likely that attackers will try to exploit unpatched versions of these pieces of software. However, these issu
Qualys
Qualys Review: Microsoft and Adobe Security Patches October 2023 | Qualys
blogs_qualys·2023-10-10
Qualys Review: Microsoft and Adobe Security Patches October 2023 | Qualys
#### Table of Contents
- Microsoft Patch Tuesday for October 2023
- Adobe Patches for October 2023
- Zero-day Vulnerability Patched in October Patch Tuesday Edition
- Other Critical Severity Vulnerabilities Patched in October Patch Tuesday Edition
- Other Microsoft Vulnerability Highlights
- Microsoft Release Summary
- Discover and Prioritize Vulnerabilities in Vulnerability Management, Detection & Response (VMDR)
- Rapid Response with Patch Management (PM)
- EVALUATE Vendor-Suggested Mitigation with Policy Compliance (PC)
- EXECUTE Mitigation Using Qualys Custom Assessment and Remediation (CAR)
- Qualys Monthly Webinar Series
Microsoft released its October edition of Patch Tuesday! In this month’s updates, Microsoft has addressed 105 vulnerabilities in different products, features, and
Trendmicro
The October 2023 Security Update Review
blogs_trendmicro·2023-10-10
The October 2023 Security Update Review
# The October 2023 Security Update Review
Get the October 2023 security update and review.
By: Dustin Childs
2023/10/10
Read time: ( words)
Save to Folio
Twenty years ago this month, Microsoft introduced the concept of “Patch Tuesday” – although the marketing folks wanted it called “Update Tuesday” (they didn’t like the word “patch”). Over the years, more companies joined the Patch Tuesday bandwagon. Here we are 20 years later, still talking about the latest security releases from Adobe and Microsoft. Pop some champagne to celebrate and join us as we review the details of the latest advisories from Adobe and Microsoft. If you’d rather watch the video recap, you can check it out here.
Adobe Patches for October 2023
For October, Adobe released three bulletins addressing 13 CVEs in Ado
Bleepingcomputer
Microsoft October 2023 Patch Tuesday fixes 3 zero-days, 104 flaws
blogs_bleepingcomputer·2023-10-10·CVSS 5.3
CVE-2023-5346 [MEDIUM] Microsoft October 2023 Patch Tuesday fixes 3 zero-days, 104 flaws
## Microsoft October 2023 Patch Tuesday fixes 3 zero-days, 104 flaws
## Lawrence Abrams
26 Elevation of Privilege Vulnerabilities
3 Security Feature Bypass Vulnerabilities
45 Remote Code Execution Vulnerabilities
12 Information Disclosure Vulnerabilities
17 Denial of Service Vulnerabilities
1 Spoofing Vulnerabilities
The total count of 104 flaws does not include one Chromium vulnerability tracked as CVE-2023-5346, which was fixed by Google on October 3rd and ported to Microsoft Edge.
To learn more about the non-security updates released today, you can review our dedicated articles on the new Windows 11 KB5031354 cumulative update and Windows 10 KB5031356 cumulative update .
## Three actively exploited zero-day vulnerabilities
This month's Patch Tuesday fixes three zero-day vulne
Trendmicro
The October 2023 Security Update Review
blogs_trendmicro·2023-10-10·CVSS 6.5
[MEDIUM] The October 2023 Security Update Review
## The October 2023 Security Update Review
Get the October 2023 security update and review.
By: Dustin Childs Oct 10, 2023 Read time: ( words)
Save to Folio
Twenty years ago this month, Microsoft introduced the concept of “Patch Tuesday” – although the marketing folks wanted it called “Update Tuesday” (they didn’t like the word “patch”). Over the years, more companies joined the Patch Tuesday bandwagon. Here we are 20 years later, still talking about the latest security releases from Adobe and Microsoft. Pop some champagne to celebrate and join us as we review the details of the latest advisories from Adobe and Microsoft. If you’d rather watch the video recap, you can check it out here.
CVE
Title
Severity
CVSS
Public
Exploited
Type
CVE-2023-36563
Microsoft WordPad Information
Krebs
Patch Tuesday, October 2023 Edition
blogs_krebs·2023-10-10·CVSS 4.4
CVE-2023-42724 [MEDIUM] Patch Tuesday, October 2023 Edition
Microsoft today issued security updates for more than 100 newly-discovered vulnerabilities in its Windows operating system and related software, including four flaws that are already being exploited. In addition, Apple recently released emergency updates to quash a pair of zero-day bugs in iOS.
Apple last week shipped emergency updates in iOS 17.0.3 and iPadOS 17.0.3 in response to active attacks. The patch fixes CVE-2023-42724, which attackers have been using in targeted attacks to elevate their access on a local device.
Apple said it also patched CVE-2023-5217, which is not listed as a zero-day bug. However, as Bleeping Computer pointed out, this flaw is caused by a weakness in the open-source “libvpx” video codec library, which was previously patched as a zero-day flaw by Google in th
Krebs
Patch Tuesday, October 2023 Edition
blogs_krebs·2023-10-10·CVSS 4.4
CVE-2023-42724 [MEDIUM] Patch Tuesday, October 2023 Edition
Microsoft today issued security updates for more than 100 newly-discovered vulnerabilities in its Windows operating system and related software, including four flaws that are already being exploited. In addition, Apple recently released emergency updates to quash a pair of zero-day bugs in iOS .
Apple last week shipped emergency updates in iOS 17.0.3 and iPadOS 17.0.3 in response to active attacks. The patch fixes CVE-2023-42724 , which attackers have been using in targeted attacks to elevate their access on a local device.
Apple said it also patched CVE-2023-5217 , which is not listed as a zero-day bug. However, as Bleeping Computer pointed out , this flaw is caused by a weakness in the open-source “ libvpx ” video codec library, which was previously patched as a zero-day flaw by Google
Qualys
Microsoft and Adobe Patch Tuesday, October 2023 Security Update Review
blogs_qualys·2023-10-10
Microsoft and Adobe Patch Tuesday, October 2023 Security Update Review
## Table of Contents
Microsoft Patch Tuesday for October 2023
Adobe Patches for October 2023
Zero-day Vulnerability Patched in October Patch Tuesday Edition
Other Critical Severity Vulnerabilities Patched in October Patch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
Discover and Prioritize Vulnerabilities in Vulnerability Management, Detection & Response (VMDR)
Rapid Response with Patch Management (PM)
EVALUATE Vendor-Suggested Mitigation with Policy Compliance (PC)
EXECUTE Mitigation Using Qualys Custom Assessment and Remediation (CAR)
Qualys Monthly Webinar Series
Microsoft released its October edition of Patch Tuesday! In this month’s updates, Microsoft has addressed 105 vulnerabilities in different products, features, and roles. Let’s t
Trendmicro
The October 2023 Security Update Review
blogs_trendmicro·2023-10-10·CVSS 6.5
[MEDIUM] The October 2023 Security Update Review
## The October 2023 Security Update Review
Get the October 2023 security update and review.
By: Dustin Childs 2023/10/10 Read time: ( words)
Save to Folio
Twenty years ago this month, Microsoft introduced the concept of “Patch Tuesday” – although the marketing folks wanted it called “Update Tuesday” (they didn’t like the word “patch”). Over the years, more companies joined the Patch Tuesday bandwagon. Here we are 20 years later, still talking about the latest security releases from Adobe and Microsoft. Pop some champagne to celebrate and join us as we review the details of the latest advisories from Adobe and Microsoft. If you’d rather watch the video recap, you can check it out here.
CVE
Title
Severity
CVSS
Public
Exploited
Type
CVE-2023-36563
Microsoft WordPad Information Di
Tenable
Microsoft’s October 2023 Patch Tuesday Addresses 103 CVEs (CVE-2023-36563, CVE-2023-41763)
blogs_tenable·2023-10-10·CVSS 6.5
[MEDIUM] Microsoft’s October 2023 Patch Tuesday Addresses 103 CVEs (CVE-2023-36563, CVE-2023-41763)
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Crowdstrike
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blogs_crowdstrike·CVSS 7.5
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Crowdstrike
October 2023 Patch Tuesday: Updates and Analysis
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] October 2023 Patch Tuesday: Updates and Analysis
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
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How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
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Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
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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
2023-10-10
Published
2023-10-10
Added to CISA KEV
Exploited in the wild