{"id":"CVE-2026-118208","aliases":["EUVD-2026-122248","GHSA-r8vm-vj9h-vcpf"],"status":"published","title":"Microsoft Exchange Server Spoofing Vulnerability","description":"Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.00821,"percentile":0.57867,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-15","CWE-284"],"published":"2026-11-10T18:21:49Z","modified":"2026-11-12T19:31:43Z","products":[{"vendor":"microsoft","product":"microsoft exchange server subscription edition rtm"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118208","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118208"},{"url":"https://github.com/advisories/GHSA-r8vm-vj9h-vcpf"}],"sources":{"cve":[{"id":"CVE-2026-118208","title":"Microsoft Exchange Server Spoofing Vulnerability","description":"Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-11-10T18:21:49.791Z","modified":"2026-11-13T18:10:32.974Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-15","CWE-284"],"updated_at":"2026-11-12T22:49:19.310661Z"}],"euvd":[{"id":"EUVD-2026-122248","description":"Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-11-10T18:21:49Z","modified":"2026-11-13T18:10:32Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:33.654843Z"}],"ghsa":[{"id":"GHSA-r8vm-vj9h-vcpf","title":"Improper access control in Microsoft Exchange Server allows an authorized attacker to perform...","description":"Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-11-10T21:33:00Z","modified":"2026-11-12T21:30:54Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","level":"high"}],"cwes":["CWE-15","CWE-284"],"updated_at":"2026-11-12T21:43:37.277087Z"}],"nvd":[{"id":"CVE-2026-118208","description":"Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-11-10T19:19:37.8Z","modified":"2026-11-12T22:18:37.477Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-15","CWE-284"],"updated_at":"2026-11-12T23:33:08.899189Z"}]}}