This indicates an attack attempt to exploit a remote buffer overflow vulnerability in AmmSoft ScriptFTP.
The vulnerability is caused by an error when handling a malformed filename. It can be exploited via a long string filename, leading to remote code execution.
AmmSoft ScriptFTP 3.3
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are not aware of any patches supplied by the vendor for this issue.