This indicates an attack attempt to exploit a Directory Traversal Vulnerability in Smart Protection Server (Standalone).
A remote, authenticated attacker could exploit this vulnerability by uploading a crafted JSON file to a vulnerable server. Successful exploitation could result in arbitrary code execution in the security context of the target application.
Trend Micro Smart Protection Server (Standalone) version 3.2 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.