CVE-2026-21245 json
Windows Kernel Elevation of Privilege Vulnerability
published 2026-02-10 8 mo ago modified 2026-08-19 2 mo ago also EUVD-2026-7322
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Patch / fix
- Microsoft Windows 11 Version 24H2 10.0.26100.7840
- Microsoft Windows 11 Version 25H2 10.0.26200.7840
- Microsoft Windows 11 version 26H1 10.0.28000.1575
- Microsoft Windows Server 2025 10.0.26100.32370
- Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32370
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | 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 |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Windows 11 Version 24H2
- Microsoft Windows 11 Version 25H2
- Microsoft Windows 11 version 26H1
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core installation)
Classification
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-21245
vendor-advisory, patch
Sources
- CVE List CVE-2026-21245
- NVD CVE-2026-21245
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