High severity7.8NVD Advisory· Published May 12, 2026· Updated Jun 17, 2026
CVE-2026-35420
CVE-2026-35420
Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Affected products
8cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*range: <10.0.25398.2330
- cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*Range: <10.0.14393.9140
- cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*Range: <10.0.17763.8755
- cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*Range: <10.0.20348.5074
- cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*Range: <10.0.26100.32772
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35420nvdVendor Advisory
News mentions
3- Patch Tuesday - May 2026Rapid7 Blog · May 13, 2026
- Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-daysBleepingComputer · May 12, 2026
- Microsoft’s May 2026 Patch Tuesday Addresses 118 CVEs (CVE-2026-41103)Tenable Blog · May 12, 2026