Microsoft Windows Ancillary Function Driver for WinSock Privilege Escalation Vulnerability

A vulnerability allowing improper access control has been identified in the Windows Ancillary Function Driver for WinSock. This flaw enables an authorized attacker to locally elevate privileges. The vulnerability affects multiple Windows versions, including various releases of Windows 10, Windows 11, Windows Server 2012, and several other Windows Server versions.

Impact

Exploitation of this vulnerability could lead to unauthorized privilege escalation, allowing an attacker to gain administrator rights.

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 KB5066791, KB5066793, KB5066835, KB5066872, KB5066873, KB5066874, KB5066875, KB5066876, KB5066877, KB5066780, KB5066782, KB5066586, and KB5066836.