This indicates an attack attempt to exploit a Remote Code Execution vulnerability in Belkin Wemo UPnP API.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted HTTP request. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application.
Belkin device with Wemo UPnP API
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.