{"id":"CVE-2021-36166","aliases":["EUVD-2021-22787","GHSA-6gm4-rphq-fcfx"],"status":"published","title":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to...","description":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01472,"percentile":0.74002,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-330"],"published":"2022-03-01T18:10:10Z","modified":"2026-06-17T03:58:26Z","products":[{"vendor":"fortinet","product":"fortimail"},{"vendor":"fortinet","product":"fortinet fortimail"}],"references":[{"url":"https://fortiguard.com/psirt/FG-IR-21-028","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36166"},{"url":"https://github.com/advisories/GHSA-6gm4-rphq-fcfx"}],"sources":{"cve":[{"id":"CVE-2021-36166","description":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.","status":"published","published":"2022-03-01T18:10:10Z","modified":"2024-10-25T13:35:15.853Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"critical","assessor":"cna"}],"updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-22787","description":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.","status":"published","published":"2022-03-01T18:10:10Z","modified":"2024-10-25T13:35:15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"critical"}],"updated_at":"2026-11-03T00:05:19.50919Z"}],"ghsa":[{"id":"GHSA-6gm4-rphq-fcfx","title":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to...","description":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.","status":"published","published":"2022-03-02T00:00:18Z","modified":"2023-02-03T05:06:41Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:53:56.446132Z"}],"nvd":[{"id":"CVE-2021-36166","description":"An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.","status":"published","published":"2022-03-01T18:15:08.24Z","modified":"2026-06-17T03:58:26.92Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:07:05.198719Z"}]}}