{"id":"CVE-2021-40856","aliases":["EUVD-2021-28012","GHSA-j9m7-v9vc-r99f"],"status":"published","title":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the ...","description":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the /about/../ substring.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.50125,"percentile":0.98923,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-706"],"published":"2021-12-13T03:20:39Z","modified":"2026-06-17T04:07:32Z","exploits":[{"source":"nuclei","id":"CVE-2021-40856","title":"Auerswald COMfortel 1400/2600/3600 IP - Authentication Bypass","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-40856.yaml"}],"products":[{"vendor":"auerswald","product":"comfortel_1400_ip_firmware"},{"vendor":"auerswald","product":"comfortel_2600_ip_firmware"},{"vendor":"auerswald","product":"comfortel_3600_ip_firmware"}],"references":[{"url":"https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analyses","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/165162/Auerswald-COMfortel-1400-2600-3600-IP-2.8F-Authentication-Bypass.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-004/-auerswald-comfortel-1400-2600-3600-ip-authentication-bypass","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40856"},{"url":"https://github.com/advisories/GHSA-j9m7-v9vc-r99f"}],"sources":{"cve":[{"id":"CVE-2021-40856","description":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the /about/../ substring.","status":"published","published":"2021-12-13T03:20:39Z","modified":"2024-08-04T02:51:07.506Z","updated_at":"2026-11-02T14:33:01.495293Z"}],"euvd":[{"id":"EUVD-2021-28012","description":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the /about/../ substring.","status":"published","published":"2021-12-13T03:20:39Z","modified":"2024-08-04T02:51:07Z","updated_at":"2026-11-03T03:24:19.692229Z"}],"ghsa":[{"id":"GHSA-j9m7-v9vc-r99f","title":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the ...","description":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the /about/../ substring.","status":"published","published":"2021-12-14T00:01:15Z","modified":"2023-01-27T05:01:11Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:41:50.079409Z"}],"nvd":[{"id":"CVE-2021-40856","description":"Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the /about/../ substring.","status":"published","published":"2021-12-13T04:15:06.973Z","modified":"2026-06-17T04:07:32.847Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-706"],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}