Microsoft Windows Telephony Service Privilege Escalation Vulnerability

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 multiple Windows versions, including various Windows 10 releases, Windows 11, and several Windows Server editions. The issue arises from a race condition that can be exploited to gain SYSTEM privileges.

Impact

Exploitation of this vulnerability could lead to unauthorized privilege escalation, allowing a user to gain elevated rights on 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 in the 'Security Update Guide'.

Added: May 12, 2026, 7:06 PM
Updated: May 12, 2026, 7:06 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
7.5
exploitability
2.9
remediation
7.7
relevance
8.1
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.