This indicates an attack attempt against a Directory Traversal vulnerability in ManageEngine OpManager,Social IT Plus and IT360.
The vulnerability is due to insufficient sanitizing of user supplied inputs when handling a crafted HTTP packet. It allows a remote attacker to upload an arbitrary file onto vulnerable systems via a crafted packet.
ManageEngine IT360 10.4 and prior
ManageEngine OpManager prior to 11.3 patch 1
ManageEngine Social IT Plus 11.0 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.