Ipswitch WS_FTP Server 4.0.2 allows remote authenticated users to execute arbitrary programs as SYSTEM by using the SITE command to modify certain iFtpSvc options that are handled by iftpmgr.exe.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15558
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-1878
http://www.securityfocus.com/bid/9953