Titan FTP server versions 3.21 and below are susceptible to a heap overflow when a command receives a command larger than 20480 bytes in size.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/34219/TitanFTPheap.txt
Source: https://packetstormsecurity.com/files/34219/TitanFTPheap.txt.html