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High MSRC-CVE-2026-21238 1 CVE

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Published Feb 10, 2026 · Updated Feb 10, 2026

Vendor: Microsoft

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.

Details

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Security updates
10.0.28000.1575 — https://support.microsoft.com/help/5077179
10.0.17763.8389 — https://support.microsoft.com/help/5075904
10.0.20348.4773 — https://support.microsoft.com/help/5075906
10.0.20348.4711 — https://support.microsoft.com/help/5075943
10.0.19044.6937 — https://support.microsoft.com/help/5075912
10.0.26100.32370 — https://support.microsoft.com/help/5075899
10.0.26100.32313 — https://support.microsoft.com/help/5075942
10.0.26200.7840 — https://support.microsoft.com/help/5077181
10.0.26200.7781 — https://support.microsoft.com/help/5077212
10.0.22631.6649 — https://support.microsoft.com/help/5075941
10.0.25398.2149 — https://support.microsoft.com/help/5075897
10.0.14393.8868 — https://support.microsoft.com/help/5075999
6.2.9200.25923 — https://support.microsoft.com/help/5075971
6.3.9600.23022 — https://support.microsoft.com/help/5075970

Vulnerabilities 1

Revision history

  1. #1

    Information published.

References