This indicates an attack attempt against a Remote Code Execution vulnerability in Western Digital Arkeia Appliance.
The vulnerability is caused by insufficient check on authentication of all clients. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application.
Western Digital Arkeia Appliance 11.0.12
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.