{"id":"CVE-2010-20121","aliases":["EUVD-2010-5310","GHSA-p9m6-qf43-qh47"],"status":"published","title":"EasyFTP Server \u003c= 1.7.0.11 CWD Command Stack Buffer Overflow","description":"EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.04635,"percentile":0.91775,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-121"],"published":"2025-08-21T20:10:20Z","modified":"2026-06-16T23:19:47Z","exploits":[{"source":"metasploit","id":"exploit/windows/ftp/easyftp_cwd_fixret","title":"EasyFTP Server CWD Command Stack Buffer Overflow","type":"exploit","platform":"Windows","date":"2010-02-16","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/windows/ftp/easyftp_cwd_fixret"}],"products":[{"vendor":"easyftp_server_project","product":"easyftp_server"},{"vendor":"kmint21 software","product":"easyftp server"}],"references":[{"url":"https://seclists.org/bugtraq/2010/Feb/202","tags":["third-party-advisory","exploit","Exploit","Mailing List","Third Party Advisory"]},{"url":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb","tags":["exploit","Exploit"]},{"url":"https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/","tags":["technical-description","exploit","Exploit","Third Party Advisory"]},{"url":"https://www.exploit-db.com/exploits/12312","tags":["exploit","Exploit","VDB Entry"]},{"url":"https://www.exploit-db.com/exploits/16737","tags":["exploit","Exploit","VDB Entry"]},{"url":"https://www.exploit-db.com/exploits/11668","tags":["exploit","Exploit","VDB Entry"]},{"url":"https://www.exploit-db.com/exploits/14402","tags":["exploit","Exploit","VDB Entry"]},{"url":"https://www.vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflow","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-20121"},{"url":"https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite"},{"url":"https://github.com/advisories/GHSA-p9m6-qf43-qh47"}],"sources":{"cve":[{"id":"CVE-2010-20121","title":"EasyFTP Server \u003c= 1.7.0.11 CWD Command Stack Buffer Overflow","description":"EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”","status":"published","published":"2025-08-21T20:10:20.597Z","modified":"2026-05-15T11:13:36.577Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:33:26.302774Z"}],"euvd":[{"id":"EUVD-2010-5310","description":"EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”","status":"published","published":"2025-08-21T20:10:20Z","modified":"2026-05-15T11:13:36Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T19:04:29.443212Z"}],"ghsa":[{"id":"GHSA-p9m6-qf43-qh47","title":"EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the...","description":"EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”","status":"published","published":"2025-08-21T21:32:06Z","modified":"2025-09-10T21:30:18Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"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"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:03:34.267891Z"}],"nvd":[{"id":"CVE-2010-20121","description":"EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”","status":"published","published":"2025-08-21T20:15:31.61Z","modified":"2026-06-16T23:19:47.057Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"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"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:02:04.957683Z"}]}}