CVE-2026-42896
High
Description
Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Windows
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-190Integer overflowCWE-122CWE-122
How to fix
Update
- microsoft windows_11_24h210.0.26100.8457 or later
- microsoft windows_11_25h210.0.26200.8457 or later
- microsoft windows_11_26h110.0.28000.2113 or later
- microsoft windows_server_202510.0.26100.32860 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_24h2 | v < 10.0.26100.8457 | 10.0.26100.8457 |
| microsoft windows_11_25h2 | v < 10.0.26200.8457 | 10.0.26200.8457 |
| microsoft windows_11_26h1 | v < 10.0.28000.2113 | 10.0.28000.2113 |
| microsoft windows_server_2025 | v < 10.0.26100.32860 | 10.0.26100.32860 |
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