{"id":"CVE-2026-26181","aliases":["EUVD-2026-22424","GHSA-55g2-jw6p-6xg8"],"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":0.00228,"percentile":0.13664,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362","CWE-416"],"published":"2026-04-14T16:57:07Z","modified":"2026-10-26T21:10:00Z","products":[{"vendor":"microsoft","product":"windows 11 version 23h2"},{"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, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26181","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26181"},{"url":"https://github.com/advisories/GHSA-55g2-jw6p-6xg8"}],"sources":{"cve":[{"id":"CVE-2026-26181","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":"2026-04-14T16:57:07.558Z","modified":"2026-10-15T15:52:25.261Z","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":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-22424","description":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-04-14T16:57:07Z","modified":"2026-10-15T15:52:25Z","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/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T17:00:13.422137Z"}],"ghsa":[{"id":"GHSA-55g2-jw6p-6xg8","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":"2026-04-14T18:30:38Z","modified":"2026-04-14T18:30:49Z","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":"2026-11-02T15:07:29.526942Z"}],"nvd":[{"id":"CVE-2026-26181","description":"Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-04-14T18:16:54.59Z","modified":"2026-10-26T21:10:00.17Z","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-362","CWE-416"],"updated_at":"2026-11-02T14:12:14.748836Z"}]}}