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CVE-2026-42896

HighCVSS 7.8/10Last modified Nov 11, 2026

Description

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

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122 CWE-190

Affected software

Vendor	Product	Versions
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.8457
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.8457
Microsoft	Windows 11 version 26H1	>= 10.0.28000.0, < 10.0.28000.2113
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.32860
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.32860

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42896Vendor Advisory

Timeline

Published: May 12, 2026
Last modified: Nov 11, 2026
NVD status: Analyzed

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CVE-2026-42896: High severity, CVSS 7.8 | Vulnix