Microsoft Windows Telephony Service Privilege Escalation Vulnerability

A use-after-free vulnerability has been identified in the Windows Telephony Service, allowing an authorized attacker to locally elevate privileges. This vulnerability affects several versions of Windows, including various editions of Windows Server, Windows 10, and Windows 11.

Impact

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

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 KB5087420, KB5087538, KB5087470, KB5087471, KB5087537, KB5087541, KB5087544, KB5089548, KB5089549, and KB5087539.