Microsoft Windows DWM Core Library Out-of-Bounds Read Vulnerability Allowing Information Disclosure

Vulnerability

A vulnerability allowing out-of-bounds read has been identified in the Windows DWM Core Library. This issue allows an authorized attacker to locally disclose information by reading small portions of heap memory. The vulnerability affects multiple versions of Windows 11 and Windows Server 2025.

Impact

Exploitation of this vulnerability could lead to unauthorized information disclosure.

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 KB5089548, KB5087539, KB5087423, and KB5089549.

Added: May 12, 2026, 7:53 PM
Updated: May 12, 2026, 7:53 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
exploitability
3.3
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.