CVE-2026-21245
Windows Kernel Elevation of Privilege Vulnerability
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
10th
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
| Vendor | microsoft |
| Product | windows 11 version 24h2 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Feb 10, 2026 |
| Last Updated | Apr 10, 2026 |
Stay Ahead of the Next One
Get instant alerts for microsoft windows 11 version 24h2
Be the first to know when new high vulnerabilities affecting microsoft windows 11 version 24h2 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
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 Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Windows 11 Version 24H2
10.0.26100.0 < 10.0.26100.7840
Microsoft / Windows 11 Version 25H2
10.0.26200.0 < 10.0.26200.7840
Microsoft / Windows 11 version 26H1
10.0.28000.0 < 10.0.28000.1575
Microsoft / Windows 11 Version 26H1
10.0.28000.0 < 10.0.28000.1575
Microsoft / Windows Server 2025
10.0.26100.0 < 10.0.26100.32370
Microsoft / Windows Server 2025 (Server Core installation)
10.0.26100.0 < 10.0.26100.32370