This indicates an attack attempt to exploit a Command Injection vulnerability in Technicolor TD5336 Router.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application. A remote attacker may be able to exploit this to execute arbitrary commands within the context of the application, via a crafted HTTP request.
Technicolor TD5336 Router
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch available for this issue.