This indicates an attack attempt to exploit a Command Injection vulnerability in D-Link DIR-620 firmware.
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.
D-Link DIR-620 Firmware 1.3.1
D-Link DIR-620 Firmware 1.3.3
D-Link DIR-620 Firmware 1.4.0
D-Link DIR-620 Firmware 2.0.22
D-Link DIR-620 Firmware 1.0.37
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch or updates available for this issue.