The REST API in CyberArk Password Vault Web Access before 9.9.5 and 10.x before 10.1 allows remote attackers to execute arbitrary code via a serialized .NET object in an Authorization HTTP header.
https://www.exploit-db.com/exploits/44429/
http://www.securitytracker.com/id/1040675
http://www.securityfocus.com/archive/1/541932/100/0/threaded