VULNERABILITY INTELLIGENCE

CVE-2026-20831

CVSS score7.8 HIGH
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-01-13
Last modified2026-07-30
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Description

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

Weakness classification

  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Primary references