Cisco has released three security advisories to address multiple vulnerabilities. These vulnerabilities may allow a local unauthenticated user to execute arbitrary commands with escalated privileges or cause a denial-of-service (DoS) condition. These vulnerabilities affect the following: •Cisco TelePresence ISDN Gateway D-Channel Denial of Service Vulnerability •Cisco TelePresence System Software Command Execution Vulnerability •Cisco TelePresence Video Communication Server SIP Denial of Service Vulnerability