Unspecified vulnerability in GlobalSCAPE Secure FTP Server before 3.1.4 Build 01.10.2006 allows attackers to cause a denial of service (application crash) via a "custom command" with a long argument.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25665
https://euvd.enisa.europa.eu/vulnerability/EUVD-2006-1694
http://www.securityfocus.com/bid/17398