This indicates an attack attempt against an Arbitrary File Upload vulnerability in Zoho ManageEngine Desktop Central.
The vulnerabilities are due to insufficient authorization in ManageEngine DesktopCentral. A remote, unauthenticated attacker can exploit the vulnerability by sending a request to one of the affected endpoints. Successful exploitation could result in remote code execution in the context of the target system.
Zoho ManageEngine Desktop Central version 10.1.2127.17 and prior
Zoho ManageEngine Desktop Central version 10.1.2128.0 to 10.1.2137.2
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.