{"id":"CVE-2026-78457","aliases":["EUVD-2026-73810","GHSA-7xvr-j8j3-8r6h"],"status":"published","title":"Windows Security Health Service Elevation of Privilege Vulnerability","description":"Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/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":"2026-11-11","score":0.00264,"percentile":0.18393,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-09-08T17:18:28Z","modified":"2026-11-10T21:37:28Z","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 2022"},{"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_11_26h1"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78457","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78457"},{"url":"https://github.com/advisories/GHSA-7xvr-j8j3-8r6h"}],"sources":{"cve":[{"id":"CVE-2026-78457","title":"Windows Security Health Service Elevation of Privilege Vulnerability","description":"Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:18:28.823Z","modified":"2026-11-10T21:37:28.893Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T22:48:53.557052Z"}],"euvd":[{"id":"EUVD-2026-73810","description":"Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:18:28Z","modified":"2026-11-10T21:37:28Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:19.311812Z"}],"ghsa":[{"id":"GHSA-7xvr-j8j3-8r6h","title":"Use after free in Windows Security Health Service allows an authorized attacker to elevate...","description":"Use after free in Windows Security Health Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:33:26Z","modified":"2026-09-08T18:34:05Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:11:34.690977Z"}],"nvd":[{"id":"CVE-2026-78457","description":"Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:20:44.407Z","modified":"2026-10-15T00:16:51.617Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}