CVE-2026-21221: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 11 Version 24H2
Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the Capability Access Management Service (camsvc) component of Windows 11 Version 24H2 (build 10.0.26100.0). Improper synchronization when accessing shared resources enables an authorized local attacker to elevate privileges. The CVSS v3.1 score is 7.0, reflecting high impact on confidentiality, integrity, and availability. The vulnerability is confirmed published and a patch is available from Microsoft.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected Windows 11 system. This could lead to full system compromise including unauthorized access to sensitive data and control over system functions. The vulnerability affects confidentiality, integrity, and availability with high severity.
Mitigation Recommendations
A patch is available from Microsoft to remediate this vulnerability. It is recommended to apply the official update for Windows 11 Version 24H2 (build 10.0.26100.0) as soon as possible to mitigate the risk. No additional vendor advisories indicate alternative mitigations or that no action is required.
CVE-2026-21221: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 11 Version 24H2
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition (CWE-362) in the Capability Access Management Service (camsvc) component of Windows 11 Version 24H2 (build 10.0.26100.0). Improper synchronization when accessing shared resources enables an authorized local attacker to elevate privileges. The CVSS v3.1 score is 7.0, reflecting high impact on confidentiality, integrity, and availability. The vulnerability is confirmed published and a patch is available from Microsoft.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected Windows 11 system. This could lead to full system compromise including unauthorized access to sensitive data and control over system functions. The vulnerability affects confidentiality, integrity, and availability with high severity.
Mitigation Recommendations
A patch is available from Microsoft to remediate this vulnerability. It is recommended to apply the official update for Windows 11 Version 24H2 (build 10.0.26100.0) as soon as possible to mitigate the risk. No additional vendor advisories indicate alternative mitigations or that no action is required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-11T21:02:05.731Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae6a60475309f9ae277
Added to database: 1/13/2026, 6:11:50 PM
Last enriched: 4/3/2026, 12:53:36 PM
Last updated: 5/7/2026, 9:41:07 PM
Views: 120
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