The remote-support feature on Cisco Web Security Virtual Appliance (WSAv) Email Security Virtual Appliance (ESAv) and Security Management Virtual Appliance (SMAv) devices before 2015-06-25 uses the same default SSH root authorized key across different customers' installations which makes it easier for remote attackers to bypass authentication by leveraging knowledge of a private key from another installation aka Bug IDs CSCuu95988 CSCuu95994 and CSCuu96630.