Buffer overflow in Ipswitch WS_FTP Limited Edition (LE) 5.08 allows remote FTP servers to execute arbitrary code via a long response to a PASV command.
https://www.exploit-db.com/exploits/2401
https://exchange.xforce.ibmcloud.com/vulnerabilities/29074
https://euvd.enisa.europa.eu/vulnerability/EUVD-2006-4960