CVE-2026-20830: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows Server 2025
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 concurrent execution using a shared resource with improper synchronization in the Capability Access Management Service (camsvc) on Windows Server 2025 version 10.0.26100.0. The race condition can be exploited by an authorized local attacker to elevate privileges. Microsoft has published an official fix to address this issue.
Potential Impact
An authorized local attacker can exploit this race condition to gain elevated privileges on the affected Windows Server 2025 system. This could lead to full system compromise with high confidentiality, integrity, and availability impacts as indicated by the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20830 to remediate this vulnerability.
CVE-2026-20830: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows Server 2025
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.
CVSS v3.1
Score 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves concurrent execution using a shared resource with improper synchronization in the Capability Access Management Service (camsvc) on Windows Server 2025 version 10.0.26100.0. The race condition can be exploited by an authorized local attacker to elevate privileges. Microsoft has published an official fix to address this issue.
Potential Impact
An authorized local attacker can exploit this race condition to gain elevated privileges on the affected Windows Server 2025 system. This could lead to full system compromise with high confidentiality, integrity, and availability impacts as indicated by the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20830 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.375Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20830","vendor":"Microsoft"}]
Threat ID: 69668adda60475309f9adfe7
Added to database: 01/13/2026, 18:11:41 UTC
Last enriched: 07/30/2026, 23:54:11 UTC
Last updated: 09/10/2026, 19:24:58 UTC
Views: 145
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