This indicates an attack attempt to exploit a Command Injection vulnerability in MVPower digital video recorders.
The vulnerability is due to insufficient validation of user supplied inputs when processing HTTP requests. It may allow remote attackers to execute arbitrary system commands within the context of the application.
MVPower model TV-7104HE firmware version 1.8.4 115215B9
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue