CVE-2026-20811: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 11 version 22H3
Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20811) is a type confusion flaw (CWE-843) in the Windows Win32K subsystem, specifically in the ICOMP component, affecting Windows 11 version 22H3 (build 10.0.22631.0). It allows an attacker with local authorized access to elevate privileges by exploiting improper handling of resource types. The CVSS v3.1 base score is 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. The vulnerability has been officially published and a patch is available from Microsoft.
Potential Impact
Successful exploitation of this vulnerability could allow a local attacker with authorized access to elevate their privileges on the affected Windows 11 system, potentially gaining higher-level permissions that could compromise system confidentiality, integrity, and availability. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 11 version 22H3 (build 10.0.22631.0) to remediate this issue. Since this is a local privilege escalation vulnerability, applying the patch will prevent attackers from exploiting this flaw to gain elevated privileges.
CVE-2026-20811: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 11 version 22H3
Description
Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20811) is a type confusion flaw (CWE-843) in the Windows Win32K subsystem, specifically in the ICOMP component, affecting Windows 11 version 22H3 (build 10.0.22631.0). It allows an attacker with local authorized access to elevate privileges by exploiting improper handling of resource types. The CVSS v3.1 base score is 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. The vulnerability has been officially published and a patch is available from Microsoft.
Potential Impact
Successful exploitation of this vulnerability could allow a local attacker with authorized access to elevate their privileges on the affected Windows 11 system, potentially gaining higher-level permissions that could compromise system confidentiality, integrity, and availability. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 11 version 22H3 (build 10.0.22631.0) to remediate this issue. Since this is a local privilege escalation vulnerability, applying the patch will prevent attackers from exploiting this flaw to gain elevated privileges.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.372Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668adaa60475309f9adf4e
Added to database: 1/13/2026, 6:11:38 PM
Last enriched: 4/3/2026, 12:41:12 PM
Last updated: 5/10/2026, 9:18:54 AM
Views: 92
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