Cisco Systems released a security patch for its Unified Communications Manager (Unified CM) enterprise telephony product in order to mitigate an attack that could allow hackers to take full control of the systems. The company also patched denial-of-service vulnerabilities in its Intrusion Prevention System software. The Cisco Unified CM is a call-processing component that extends enterprise telephony features and functions to IP phones, media-processing devices, VoIP gateways, and multimedia applications, according to Cisco.