CVE-2026-42896

Windows DWM Core Library Elevation of Privilege Vulnerability

State: Published
Severity: 7.8 High
Published: May 12, 2026
Updated: Aug 10, 2026
Reserved: Apr 30, 2026

Description

Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-190 Integer Overflow or Wraparound
CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.8457Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.8457Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2113Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.32860Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.32860Affected

References

Windows DWM Core Library Elevation of Privilege Vulnerabilityvendor-advisorypatch

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