Local privilege escalation via camsvc race
Published Jan 13, 2026 · Updated Jan 13, 2026
Local privilege escalation in Microsoft Windows Server 2025 before 10.0.26100.32230 allows local users to gain elevated privileges. The Capability Access Management Service (camsvc) accesses a shared resource without proper synchronization, creating a race that can leave the service using freed memory. Exploitation requires existing low-privilege local access and precise race timing; Microsoft has not disclosed the specific object or operation involved.
Summary
What happened
Local privilege escalation in Microsoft Windows Server 2025 before 10.0.26100.32230 allows local users to gain elevated privileges. The Capability Access Management Service (camsvc) accesses a shared resource without proper synchronization, creating a race that can leave the service using freed memory. Exploitation requires existing low-privilege local access and precise race timing; Microsoft has not disclosed the specific object or operation involved.
The record
- CVE
- CVE-2026-20830
- Published
- Jan 13, 2026
- Updated
- Jan 13, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-362, CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 13, 2026CVE publishedPublication date reported by the CVE source.
- Jan 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.7623
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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