MICROSOFT-CVE-2026-26173

HIGH7.0

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Published Apr 14, 2026

Modified 3 weeks ago

Details

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

References

ADVISORY

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26173

CVSS Analysis

CVSS v2.0

7.0

Upstream

CVE-2026-26173

Ecosystems

Timeline

PublishedApr 14, 2026

ModifiedApr 14, 2026