CVE-2026-35420 json
Windows Kernel Elevation of Privilege Vulnerability
published 2026-05-12 5 mo ago modified 2026-10-26 13 d ago also EUVD-2026-29627
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- 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 Server 2012 6.2.9200.26079
- Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.26079
- Microsoft Windows Server 2012 R2 6.3.9600.23181
- Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.23181
- Microsoft Windows Server 2016 10.0.14393.9140
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9140
- Microsoft Windows Server 2019 10.0.17763.8755
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.8755
- Microsoft Windows Server 2022 10.0.20348.5139
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2330
- Microsoft Windows Server 2025 10.0.26100.32860
- Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32860
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% 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 Server 2012
- Microsoft Windows Server 2012 (Server Core installation)
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2012 R2 (Server Core installation)
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows Server 2022
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core installation)
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-35420
vendor-advisory, patch
Sources
- CVE List CVE-2026-35420
- NVD CVE-2026-35420
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.