This indicates an attack attempt against a Cross-Site Scripting vulnerability in Cisco EPC3925.
The vulnerability is due to an design flaw when the vulnerable software attempts to handle an HTTP request to Quick_setup interface. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious webpage and be granted the admin privileges on the vulnerable application.
Cisco EPC3925 epc3925-E10-5-v302r125572-130520c
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.