This indicates an attack attempt to exploit a Remote Code Execution Vulnerability in Micro Focus Secure Messaging Gateway.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted HTTP request. An attacker can exploit this to overwrite and execute arbitrary code on the affected machine via a crafted HTTP request.
Micro Focus Secure Messaging Gateway version 470 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.