{"id":"CVE-2001-1444","aliases":["EUVD-2001-1424","GHSA-gf54-vw48-28p7"],"status":"published","title":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does...","description":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does not encrypt authentication and encryption options sent from the server, which allows remote attackers to downgrade authentication and encryption mechanisms via a man-in-the-middle attack.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01296,"percentile":0.70544,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2001-08-27T04:00:00Z","modified":"2026-06-16T21:56:17Z","products":[{"vendor":"kth","product":"kth_kerberos"}],"references":[{"url":"http://josefsson.org/ktelnet/kerberos-telnet.html","tags":["x_refsource_MISC","x_transferred","Exploit"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/10640","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.kb.cert.org/vuls/id/774587","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-1444"},{"url":"https://github.com/advisories/GHSA-gf54-vw48-28p7"}],"sources":{"cve":[{"id":"CVE-2001-1444","description":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does not encrypt authentication and encryption options sent from the server, which allows remote attackers to downgrade authentication and encryption mechanisms via a man-in-the-middle attack.","status":"published","published":"2005-04-21T04:00:00Z","modified":"2024-08-08T04:58:11.496Z","updated_at":"2026-11-02T14:34:42.680977Z"}],"euvd":[{"id":"EUVD-2001-1424","description":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does not encrypt authentication and encryption options sent from the server, which allows remote attackers to downgrade authentication and encryption mechanisms via a man-in-the-middle attack.","status":"published","published":"2005-04-21T04:00:00Z","modified":"2024-08-08T04:58:11Z","updated_at":"2026-11-03T00:56:27.245824Z"}],"ghsa":[{"id":"GHSA-gf54-vw48-28p7","title":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does...","description":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does not encrypt authentication and encryption options sent from the server, which allows remote attackers to downgrade authentication and encryption mechanisms via a man-in-the-middle attack.","status":"published","published":"2022-04-30T18:18:03Z","modified":"2023-01-30T05:05:52Z","updated_at":"2026-11-02T14:47:22.035472Z"}],"nvd":[{"id":"CVE-2001-1444","description":"The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does not encrypt authentication and encryption options sent from the server, which allows remote attackers to downgrade authentication and encryption mechanisms via a man-in-the-middle attack.","status":"published","published":"2001-08-27T04:00:00Z","modified":"2026-06-16T21:56:17.273Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:00:40.572315Z"}]}}