{"id":"CVE-2026-118150","aliases":["EUVD-2026-122241","GHSA-v653-4rmx-34gj"],"status":"published","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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":"2026-11-14","score":0.00902,"percentile":0.60264,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-11-10T18:21:46Z","modified":"2026-11-10T21:33:00Z","products":[{"vendor":"microsoft","product":"microsoft exchange server subscription edition rtm"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118150","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118150"},{"url":"https://github.com/advisories/GHSA-v653-4rmx-34gj"}],"sources":{"cve":[{"id":"CVE-2026-118150","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-11-10T18:21:46.259Z","modified":"2026-11-13T18:10:29.143Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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-639"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-122241","description":"Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-11-10T18:21:46Z","modified":"2026-11-13T18:10:29Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:33.654843Z"}],"ghsa":[{"id":"GHSA-v653-4rmx-34gj","title":"Authorization bypass through user-controlled key in Microsoft Exchange Server allows an...","description":"Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-11-10T21:33:00Z","modified":"2026-11-10T21:33:00Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-10T21:57:51.137748Z"}],"nvd":[{"id":"CVE-2026-118150","description":"Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-11-10T19:19:36.603Z","modified":"2026-11-10T20:18:14.567Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-10T22:21:32.984056Z"}]}}