HIGHCVE-2026-21245Published Modified CNA microsoft
CVE-2026-21245: Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Metrics
- CVSS v3.1
- 7.8
- Severity
- HIGH
- Fixed in
- 10.0.26100.7840
- Affected Products
- 6
Fix available
10.0.26100.784010.0.26100.3237010.0.26200.784010.0.28000.1575
Patch commits
Affected packages
- Microsoft / Windows 11 Version 24H2< 10.0.26100.7840 (from 10.0.26100.0)
- Microsoft / Windows 11 Version 25H2< 10.0.26200.7840 (from 10.0.26200.0)
- Microsoft / Windows 11 version 26H1< 10.0.28000.1575 (from 10.0.28000.0)
- Microsoft / Windows 11 Version 26H1< 10.0.28000.1575 (from 10.0.28000.0)
- Microsoft / Windows Server 2025< 10.0.26100.32370 (from 10.0.26100.0)
- Microsoft / Windows Server 2025 (Server Core installation)< 10.0.26100.32370 (from 10.0.26100.0)
CVSS Vector
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