{"id":"CVE-2026-50458","aliases":["EUVD-2026-44077","GHSA-2926-79wg-c74j"],"status":"published","title":"Microsoft Brokering File System Elevation of Privilege Vulnerability","description":"Use after free in Microsoft Brokering File System 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":0.00256,"percentile":0.17274,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362","CWE-416"],"published":"2026-07-14T17:07:40Z","modified":"2026-11-01T17:35:16Z","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_11_26h1"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50458","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50458"},{"url":"https://github.com/advisories/GHSA-2926-79wg-c74j"}],"sources":{"cve":[{"id":"CVE-2026-50458","title":"Microsoft Brokering File System Elevation of Privilege Vulnerability","description":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:07:40.248Z","modified":"2026-11-01T17:35:16.393Z","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-416","CWE-362"],"updated_at":"2026-11-02T14:20:08.734143Z"}],"euvd":[{"id":"EUVD-2026-44077","description":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:07:40Z","modified":"2026-11-01T17:35:16Z","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":"2026-11-02T16:58:47.914819Z"}],"ghsa":[{"id":"GHSA-2926-79wg-c74j","title":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate...","description":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T18:32:25Z","modified":"2026-07-14T18:32:25Z","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-362"],"updated_at":"2026-11-02T15:09:29.53235Z"}],"nvd":[{"id":"CVE-2026-50458","description":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T18:17:50.91Z","modified":"2026-07-22T16:17:59.653Z","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-362","CWE-416"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}