Cisco TelePresence Video Communication Server (VCS) Expressway X8.5.1 and X8.5.2 allows local users to write to arbitrary files via an unspecified symlink attack, aka Bug ID CSCuv11969.
http://www.securitytracker.com/id/1033781
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151007-vcs