Buffer overflow in the ActiveX control (DartFtp.dll) in Dart Communications PowerTCP FTP for ActiveX 2.0.2 0 allows remote attackers to execute arbitrary code via a long SecretKey property.
https://www.exploit-db.com/exploits/6840
https://www.exploit-db.com/exploits/6793
https://exchange.xforce.ibmcloud.com/vulnerabilities/45975