The default configuration of Cisco Tandberg C Series Endpoints, and Tandberg E and EX Personal Video units, with software before TC4.0.0 has a blank password for the root account, which makes it easier for remote attackers to obtain access via an unspecified login method.
secunia.com/advisories/43158
securityreason.com/securityalert/8060
securitytracker.com/id?1025017
tools.cisco.com/security/center/viewAlert.x?alertId=22314
www.cisco.com/en/US/products/ps11422/products_security_advisory09186a0080b69541.shtml
www.exploit-db.com/exploits/16100
www.kb.cert.org/vuls/id/436854
www.securityfocus.com/bid/46107