This indicates an attack attempt to exploit a remote Code Execution Vulnerability in GE Proficy CIMPLICITY.
The vulnerability is due to an error when a vulnerable servlet handles a maliciously crafted BCL file. A remote attacker could exploit this to execute arbitrary code execution within the context of the application, via a crafted BCL file.
GE Proficy CIMPLICITY 7.5
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.