This indicates an attack attempt to exploit a Command Injection Vulnerability in WWBN AVideo.
The vulnerability is due to improper input validation when executing a command. A remote, authenticated attacker could exploit this vulnerability by sending a crafted request to the target server. Successful exploitation could result in execution of arbitrary commands in the security context of the user running the server.
WWBN AVideo prior to commit 21fed6e
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.