The remote host is vulnerable to a buffer overflow.
The remote host is running the ArGoSoft FTP Server. This version of ArGoSoft FTP Server is vulnerable to a flaw when parsing a malicious RNTO command from an authenticated (or anonymous) user. An attacker exploiting this flaw would be able to execute arbitrary code on the remote FTP server.
Upgrade to version 126.96.36.199 or higher.