The Mobile and Remote Access (MRA) component in Cisco TelePresence Video Communication Server (VCS) X8.1 through X8.7 and Expressway X8.1 through X8.6 mishandles certificates, which allows remote attackers to bypass authentication via an arbitrary trusted certificate, aka Bug ID CSCuz64601.
http://www.securitytracker.com/id/1036237
http://www.securityfocus.com/bid/91669
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160706-vcs