Microsoft Windows Overlay Filter Privilege Escalation Vulnerability

Vulnerability

A buffer over-read vulnerability has been identified in the Windows Overlay Filter, allowing an authorized attacker to locally elevate privileges. This issue affects multiple Windows 10 versions, Windows 11, Windows Server 2016, Windows Server 2019, and Windows Server 2022.

Impact

Exploitation of this vulnerability could lead to unauthorized privilege escalation.

Remediation

Users can download the security update for this vulnerability via the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles KB5099539 for Windows 10, KB5101649 for Windows 11, KB5099538 for Windows Server 2019, and KB5099540 for Windows Server 2022.

Added: Jul 14, 2026, 11:32 PM
Updated: Jul 14, 2026, 11:32 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
7.5
exploitability
3.3
remediation
7.7
relevance
9.6
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.