An unauthenticated command-execution vulnerability exists in TerraMaster TOS through 4.2.06 via shell metacharacters in the Event parameter in include/makecvs.php during CSV creation.
https://www.exploit-db.com/exploits/49330
http://packetstormsecurity.com/files/172880/TerraMaster-TOS-4.2.06-Remote-Code-Execution.html