{"id":"CVE-2021-4432","aliases":["EUVD-2021-34259","GHSA-v462-3xw3-jqx3"],"status":"published","title":"PCMan FTP Server USER Command denial of service","description":"A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01331,"percentile":0.71316,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-404"],"published":"2024-01-16T14:31:03Z","modified":"2026-08-19T17:19:07Z","products":[{"vendor":"pcman","product":"ftp server"},{"vendor":"pcman","product":"ftp_server"}],"references":[{"url":"https://vuldb.com/?id.250719","tags":["vdb-entry","x_transferred","Third Party Advisory"]},{"url":"https://vuldb.com/?ctiid.250719","tags":["signature","permissions-required","x_transferred","Permissions Required","Third Party Advisory"]},{"url":"https://packetstormsecurity.com/files/163104/PCMan-FTP-Server-2.0.7-Denial-Of-Service.html","tags":["related","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://0day.today/exploit/description/36412","tags":["exploit","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4432"},{"url":"https://github.com/advisories/GHSA-v462-3xw3-jqx3"}],"sources":{"cve":[{"id":"CVE-2021-4432","title":"PCMan FTP Server USER Command denial of service","description":"A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.","status":"published","published":"2024-01-16T14:31:03.717Z","modified":"2025-06-17T21:19:14.683Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","assessor":"cna"}],"cwes":["CWE-404"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-34259","description":"A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.","status":"published","published":"2024-01-16T14:31:03Z","modified":"2025-06-17T21:19:14Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T20:32:21.000623Z"}],"ghsa":[{"id":"GHSA-v462-3xw3-jqx3","title":"A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This...","description":"A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.","status":"published","published":"2024-01-16T15:30:28Z","modified":"2024-01-16T15:30:34Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-404"],"updated_at":"2026-11-02T14:55:25.607975Z"}],"nvd":[{"id":"CVE-2021-4432","description":"A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.","status":"published","published":"2024-01-16T15:15:08.28Z","modified":"2026-08-19T17:19:07.717Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-404"],"updated_at":"2026-11-02T14:07:08.163458Z"}]}}