{"id":"CVE-2026-35420","aliases":["EUVD-2026-29627","GHSA-g3c9-x495-5rjg"],"status":"published","title":"Windows Kernel Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0032,"percentile":0.2522,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-05-12T16:58:31Z","modified":"2026-10-26T18:10:00Z","products":[{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35420","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35420"},{"url":"https://github.com/advisories/GHSA-g3c9-x495-5rjg"}],"sources":{"cve":[{"id":"CVE-2026-35420","title":"Windows Kernel Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:58:31.407Z","modified":"2026-08-10T15:12:44.713Z","cvss":[{"version":"3.1","score":7.8,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:20:05.15083Z"}],"euvd":[{"id":"EUVD-2026-29627","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:58:31Z","modified":"2026-08-10T15:12:44Z","cvss":[{"version":"3.1","score":7.8,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:02:02.865075Z"}],"ghsa":[{"id":"GHSA-g3c9-x495-5rjg","title":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges...","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:30:44Z","modified":"2026-05-12T18:30:50Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:08:05.647564Z"}],"nvd":[{"id":"CVE-2026-35420","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:17:12.557Z","modified":"2026-10-26T18:10:00.173Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:18.613259Z"}]}}