CVE-2026-20830 Capability Access Management Service (camsvc) Elevation of Privilege Vulnerability
A race condition in the Windows Capability Access Management Service allows local attackers to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20830?
CVE-2026-20830 is a high-severity vulnerability in Microsoft Windows Server 2025, published on 13 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-20830?
It affects 1 product.
Products include Microsoft Windows Server 2025.
How do I fix CVE-2026-20830?
No fix has been published for CVE-2026-20830 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-20830 being exploited?
There is no known exploitation of CVE-2026-20830 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2025
- CVE-2026-69765 Windows Storport Miniport Driver Remote Code Execution Vulnerability
- CVE-2026-49169 Windows DNS Server Remote Code Execution Vulnerability
- CVE-2026-34332 Windows Kernel-Mode Driver Remote Code Execution Vulnerability
- CVE-2026-72928 Windows DNS Server Remote Code Execution Vulnerability
- CVE-2025-53779 Windows Kerberos Elevation of Privilege Vulnerability
Sources
Also known as GHSA-5q9m-xqg4-7xqr.