This indicates an attack attempt against an Path Traversal vulnerability in ManageEngine Desktop Central.
The vulnerability is due to insufficient sanitizing of user supplied inputs when handling a crafted HTTP packet. It allows a remote attacker to execute malicious codes against affected machine via crafted requests.
ManageEngine DesktopCentral prior to build 90104
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the latest update from the vendor