CVEvulnerability

CVE-2026-21236

7.8 HIGH Published 2026-02-10 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-122, CWE-787

Description

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

Affected configurations

• microsoft windows 10 1607 (< 10.0.14393.8868) • microsoft windows 10 1809 (< 10.0.17763.8389) • microsoft windows 10 21h2 (< 10.0.19044.6937) • microsoft windows 10 22h2 (< 10.0.19045.6937) • microsoft windows 11 23h2 (< 10.0.22631.6649) • microsoft windows 11 24h2 (< 10.0.26100.7781) • microsoft windows 11 25h2 (< 10.0.26200.7781) • microsoft windows server 2012 • microsoft windows server 2012 r2 • microsoft windows server 2016 (< 10.0.14393.8868) • microsoft windows server 2019 (< 10.0.17763.8389) • microsoft windows server 2022 (< 10.0.20348.4711) • microsoft windows server 2022 23h2 (< 10.0.25398.2149) • microsoft windows server 2025 (< 10.0.26100.32313)

Related

Weakness · CWE (2)

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

References