System command injection in the /DroboAccess/delete_user endpoint in Drobo 5N2 NAS version 4.0.5-13.28.96115 allows unauthenticated attackers to execute system commands via the "username" URL parameter.
https://blog.securityevaluators.com/call-me-a-doctor-new-vulnerabilities-in-drobo5n2-4f1d885df7fc
http://packetstormsecurity.com/files/156710/Drobo-5N2-4.1.1-Remote-Command-Injection.html