What’s Vulnerable › Vulnerabilities

CVE-2026-44811: Windows DWM Core Library Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-09-24
• Weakness: CWE-122

Description

Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Windows 11 version 26H1: before 10.0.28000.2269 — fixed in 10.0.28000.2269
• Microsoft Windows 11 version 26H1: from 10.0.28000.0 before 10.0.28000.2269 — fixed in 10.0.28000.2269

How to fix

Upgrade to a fixed version: Microsoft Windows 11 version 26H1 10.0.28000.2269; Microsoft Windows 11 version 26H1 10.0.28000.2269. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44811

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