Microsoft Windows Ancillary Function Driver for WinSock Privilege Escalation Vulnerability

Vulnerability

A use-after-free vulnerability has been identified in the Windows Ancillary Function Driver for WinSock. This vulnerability allows an authorized attacker to elevate privileges locally. The issue arises from improper memory management, which can be exploited to gain unauthorized access to elevated rights.

Impact

Exploitation of this vulnerability could lead to unauthorized privilege escalation, allowing a standard user to gain elevated rights and potentially crash the system.

Remediation

Users can apply the security update for this vulnerability, which is available through the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles linked within the update guide.

Added: Apr 14, 2026, 9:33 PM
Updated: Apr 14, 2026, 9:33 PM

Vulnerability Rating

Custom Algorithm
spread
0.0
impact
7.5
exploitability
2.9
remediation
0.0
relevance
5.9
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.