ThreatCluster

CVE-2026: Race Condition Vulnerabilities in Windows Services

First seen 14 Apr 2026, 17:34 UTC • •61

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ThreatCluster •April 15, 2026 at 17:18 UTC

•CVE-2026 includes vulnerabilities in Windows Biometric Service and Ancillary Function Driver.
•Attackers can exploit these race conditions to bypass security or elevate privileges.
•Microsoft has released patches for these vulnerabilities as of April 14, 2026.

On April 14, 2026, Microsoft disclosed CVE-2026, which identifies multiple vulnerabilities in Windows services due to improper synchronization leading to race conditions. The vulnerabilities affect the Windows Biometric Service and the Windows Ancillary Function Driver for WinSock. An unauthorized attacker can exploit the race condition in the Biometric Service to bypass security features through physical attacks. Meanwhile, the Ancillary Function Driver vulnerability allows an authorized attacker to elevate privileges locally. The impact is significant as it could allow unauthorized access to sensitive systems and data. Microsoft has released patches to mitigate these vulnerabilities. Users are advised to apply the updates immediately to secure their systems. The vulnerabilities underscore the importance of proper synchronization in software development.

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Timeline

2026-04-14

CVE-2026 disclosed by Microsoft

2026-04-14

Patches released for affected Windows services

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3 entities, 2 inferred relationships (STIX 2.1).

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Technique (2)

Zero-day Exploit
T1068 - Exploitation for Privilege Escalation

Affected Platform (1)

Windows

Relationships

Zero-day Exploit targets Windows
T1068 - Exploitation for Privilege Escalation targets Windows

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