CVE-2025-54099 HIGH

CVE-2025-54099: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Vendor Microsoft
Product Windows 10 Version 1507
Weakness CWE-121
Published September 9, 2025
Last update February 20, 2026
View on NVD All CVEs

CVSS base score

7.0/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

September 9, 2025 CVE published
February 20, 2026 Record updated