CVE-2026-85855: Windows DWM Core Library Elevation of Privilege Vulnerability
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
Other sources
Windows DWM Core Library Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running Microsoft Windows 11 or Microsoft Windows Server 2025 are identified as affected. Exploitation is local, so the attacker must be able to execute in the target environment.
What level of access does an attacker need?
The attacker must already be authorized on the affected system and have low privileges. No user interaction is required.
What is the likely impact of successful exploitation?
Successful exploitation can elevate the attacker's privileges locally. The supplied vector indicates potential high impact to confidentiality, integrity, and availability.