Windows Ancillary Function Driver for WinSock — security advisories

vendor: Microsoft7 advisories3 exploited2 sourceslatest 2026-06-09⚡ RSS feed

Every advisory CSIRTS.com has correlated to Windows Ancillary Function Driver for WinSock, newest first — across national CERTs, vendor PSIRTs and vulnerability databases.

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CVE-2026-42911: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-42911msrc2026-06-09

CVE-2026-34335: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-34335msrc2026-06-09

CVE-2026-45598: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-45598msrc2026-06-09

CVE-2026-45638: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-45638msrc2026-06-09

CVE-2025-32709: Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability

criticalexploitedCVE-2025-32709cisa-kev2025-05-13

CVE-2025-21418: Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability

criticalexploitedCVE-2025-21418cisa-kev2025-02-11

CVE-2024-38193: Microsoft Windows Ancillary Function Driver for WinSock Privilege Escalation Vulnerability

criticalexploitedCVE-2024-38193cisa-kev2024-08-13