VULNERABILITY INTELLIGENCE

CVE-2026-21236

CVSS score7.8 HIGH
EPSS probability0.45%
CISA KEVNot currently listed
Published2026-02-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Weakness classification

  • CWE-122: Heap-based Buffer Overflow
  • CWE-787: Out-of-bounds Write

Primary references