{"id":"CVE-2026-21245","aliases":["EUVD-2026-7322","GHSA-w8gr-fpp3-xwvp"],"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":"2026-11-12","score":0.00439,"percentile":0.38614,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2026-02-10T17:51:42Z","modified":"2026-08-19T16:26:11Z","products":[{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21245","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21245"},{"url":"https://github.com/advisories/GHSA-w8gr-fpp3-xwvp"}],"sources":{"cve":[{"id":"CVE-2026-21245","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":"2026-02-10T17:51:42.716Z","modified":"2026-08-19T16:26:11.947Z","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":"2026-11-02T13:41:42.05254Z"}],"euvd":[{"id":"EUVD-2026-7322","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-02-10T17:51:42Z","modified":"2026-08-19T16:26:11Z","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":"2026-11-02T18:01:44.172516Z"}],"ghsa":[{"id":"GHSA-w8gr-fpp3-xwvp","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":"2026-02-10T18:30:41Z","modified":"2026-02-11T21:30:37Z","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","CWE-787"],"updated_at":"2026-11-02T15:06:09.03825Z"}],"nvd":[{"id":"CVE-2026-21245","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-02-10T18:16:25.843Z","modified":"2026-06-17T10:18:21.17Z","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","CWE-787"],"updated_at":"2026-11-02T14:12:05.52517Z"}]}}