Buffer overflow in Microsoft Windows Server 2012
CVE-2026-35420
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Vulnerability class: Buffer Overflow
EPSS: 0.000 (15.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: 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 — versions 6.2.9200.0
- Microsoft Windows_server_2012 — versions r2
- Microsoft Windows Server 2012 R2 — versions 6.3.9600.0
- Microsoft Windows Server 2012 R2 (Server Core Installation) — versions 6.3.9600.0
- Microsoft Windows Server 2012 (Server Core Installation) — versions 6.2.9200.0
- Microsoft Windows Server 2016 — versions 10.0.14393.0
- Microsoft Windows_server_2016
- Microsoft Windows Server 2016 (Server Core Installation) — versions 10.0.14393.0
- Microsoft Windows Server 2019 — versions 10.0.17763.0
- Microsoft Windows_server_2019
Weakness classification (CWE)
References
- Windows Kernel Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-35420?
- CVE-2026-35420 is a high-severity vulnerability in Microsoft Windows Server 2012, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-05-12.
- How severe is CVE-2026-35420?
- High severity. CVSS v3 base score is 7.8 out of 10.