{"id":"CVE-2010-20049","aliases":["EUVD-2010-5303","GHSA-fh65-c5x2-5936"],"status":"published","title":"LeapFTP \u003c 3.1.x Stack Buffer Overflow","description":"LeapFTP \u003c 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.","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":"2026-11-09","score":0.01189,"percentile":0.68148,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-121"],"published":"2025-08-20T15:36:11Z","modified":"2026-06-16T23:19:45Z","exploits":[{"source":"metasploit","id":"exploit/windows/ftp/leapftp_list_reply","title":"LeapFTP 3.0.1 Stack Buffer Overflow","type":"exploit","platform":"Windows","date":"2010-10-12","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/windows/ftp/leapftp_list_reply"}],"products":[{"vendor":"leapware","product":"leapftp"}],"references":[{"url":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/leapftp_list_reply.rb","tags":["exploit"]},{"url":"https://www.exploit-db.com/exploits/16704","tags":["exploit"]},{"url":"https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/","tags":["technical-description","exploit"]},{"url":"https://web.archive.org/web/20111013232627/http://www.leapware.com/","tags":["vendor-advisory","patch"]},{"url":"https://www.vulncheck.com/advisories/leapftp-stack-buffer-overflow","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-20049"},{"url":"https://web.archive.org/web/20111013232627/http://www.leapware.com"},{"url":"https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client"},{"url":"https://github.com/advisories/GHSA-fh65-c5x2-5936"}],"sources":{"cve":[{"id":"CVE-2010-20049","title":"LeapFTP \u003c 3.1.x Stack Buffer Overflow","description":"LeapFTP \u003c 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.","status":"published","published":"2025-08-20T15:36:11.493Z","modified":"2026-05-15T11:13:28.335Z","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-2010-5303","description":"LeapFTP \u003c 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.","status":"published","published":"2025-08-20T15:36:11Z","modified":"2026-05-15T11:13:28Z","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":"2026-11-02T19:04:30.03108Z"}],"ghsa":[{"id":"GHSA-fh65-c5x2-5936","title":"LeapFTP \u003c 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser....","description":"LeapFTP \u003c 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.","status":"published","published":"2025-08-20T18:30:21Z","modified":"2025-08-20T18:30:21Z","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"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:03:21.511205Z"}],"nvd":[{"id":"CVE-2010-20049","description":"LeapFTP \u003c 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.","status":"published","published":"2025-08-20T16:15:33.773Z","modified":"2026-06-16T23:19:45.377Z","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"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:02:04.957683Z"}]}}