SB2025091015 - Privilege escalation in Microsoft Windows Ancillary Function Driver for WinSock
Published: September 10, 2025
Security Bulletin ID
SB2025091015
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Stack-based buffer overflow (CVE-ID: CVE-2025-54099)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in Windows Ancillary Function Driver for WinSock. A local user can trigger stack-based buffer overflow and gain elevated privileges on the target system.
Remediation
Install update from vendor's website.