This indicates an attack attempt to exploit a Remote Command Execution vulnerability in TP-Link SC2020n Network Video Camera.
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.
TP-Link SC2020n Network Video Camera
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any patch from a vendor.