This indicates an attack attempt to exploit a Cross-Site Scripting Vulnerability in Delta Electronics DIALink.
The vulnerability is due to input validation error when processing comment parameter in events endpoint. A remote, authenticated attacker can exploit this vulnerability with crafted requests to the target server. Successful exploitation could result in arbitrary script execution in the target user's browser.
Delta Electronics DIALink 184.108.40.206 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.