CVE-2026-45657 in the critical feed json
Windows Kernel Remote Code Execution Vulnerability
published 2026-06-09 5 mo ago modified 2026-09-24 45 d ago also EUVD-2026-35697
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 15.5%
- EPSS 15.5% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.
Patch / fix
- Microsoft Windows 11 version 23H2 10.0.22631.7219
- Microsoft Windows 11 Version 24H2 10.0.26100.8655
- Microsoft Windows 11 Version 25H2 10.0.26200.8655
- Microsoft Windows 11 version 26H1 10.0.28000.2269
- Microsoft Windows Server 2022 10.0.20348.5256
- Microsoft Windows Server 2025 10.0.26100.32995
- Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32995
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
15.48% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Windows 11 version 23H2
- Microsoft Windows 11 Version 24H2
- Microsoft Windows 11 Version 25H2
- Microsoft Windows 11 version 26H1
- Microsoft Windows Server 2022
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core installation)
Classification
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-45657
vendor-advisory, patch
Sources
- CVE List CVE-2026-45657
- NVD CVE-2026-45657
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.