CVE-2026-20831

Time-of-check time-of-use toctou race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally...

CVE-2026-20831

creationtimestamp| type| source ---|---|--- 2026-01-13 18:01:16+00:00| seen| https://www.thezdi.com/blog/2026/1/13/the-january-2026-security-update-review 2026-01-13 18:16:30+00:00| seen| https://advisories.ncsc.nl/advisory?id=NCSC-2026-0007 2026-04-10 10:53:42+00:00| seen|...

CVE-2026-20831 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

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CVE-2026-20831

The CVE-2026-20831 entry corresponds to a TOCTOU race condition in Windows Ancillary Function Driver for WinSock that could allow a local, authenticated attacker to elevate privileges. The description in the initial document confirms local privilege escalation as the impact. Connected documents i...