Authenticated service interruption via SAM deadlock
Published Jan 14, 2025 · Updated Jun 9, 2026
Deadlock in Microsoft Windows Security Account Manager allows remote authenticated users to interrupt the service through a network request. Microsoft identifies CWE-833 but has not published the request path, locking sequence, or code path that enters the deadlock. Low-privileged authentication and network reachability are required; successful exploitation disrupts availability without disclosed data access or modification.
Summary
What happened
Deadlock in Microsoft Windows Security Account Manager allows remote authenticated users to interrupt the service through a network request. Microsoft identifies CWE-833 but has not published the request path, locking sequence, or code path that enters the deadlock. Low-privileged authentication and network reachability are required; successful exploitation disrupts availability without disclosed data access or modification.
The record
- CVE
- CVE-2025-21313
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-833, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 9, 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 <10.0.26100.2894
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.
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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