{"id":"CVE-2021-3304","aliases":["EUVD-2021-26638","GHSA-79r4-9j2m-5f8q"],"status":"published","title":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform...","description":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.","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","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01636,"percentile":0.76484,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2021-01-26T06:05:15Z","modified":"2026-06-17T04:04:54Z","products":[{"vendor":"sagemcom","product":"f\\@st_3686_firmware"}],"references":[{"url":"https://twitter.com/j0nh4t/status/1349649975479840769","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3304"},{"url":"https://github.com/advisories/GHSA-79r4-9j2m-5f8q"}],"sources":{"cve":[{"id":"CVE-2021-3304","description":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.","status":"published","published":"2021-01-26T06:05:15Z","modified":"2024-08-03T16:53:16.567Z","updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-26638","description":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.","status":"published","published":"2021-01-26T06:05:15Z","modified":"2024-08-03T16:53:16Z","updated_at":"2026-11-03T03:25:13.531128Z"}],"ghsa":[{"id":"GHSA-79r4-9j2m-5f8q","title":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform...","description":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.","status":"published","published":"2022-05-24T17:40:24Z","modified":"2023-01-29T05:05:09Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:45:43.481618Z"}],"nvd":[{"id":"CVE-2021-3304","description":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.","status":"published","published":"2021-01-26T18:16:29.88Z","modified":"2026-06-17T04:04:54.473Z","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":"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-120"],"updated_at":"2026-11-02T14:06:49.660551Z"}]}}