7.8
High
CVE-2026-42896 Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally
Description
Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.8457 | 10.0.26100.8457 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.8457 | 10.0.26200.8457 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2113 | 10.0.28000.2113 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.32860 | 10.0.26100.32860 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.32860 | 10.0.26100.32860 |
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