Cisco will host private instances of its flagship IP-based telephony platform in its cloud data centers to woo large businesses looking to move to the cloud with as little disruption as possible. It's ...

Attackers have begun actively exploiting a critical flaw in Cisco Unified Communications Manager (CUCM) to gain root access on vulnerable systems. The attacks appear to have begun less than 24 hours ...

If you recall, back in March, I talked about how Cisco was embracing the SIP standard, i.e. "Cisco is fully embracing the SIP standard on their desktop phones. I interviewed Cisco last week and they ...

Cisco has removed a backdoor account from its Unified Communications Manager (Unified CM), which would have allowed remote attackers to log in to unpatched devices with root privileges. Cisco Unified ...

Cisco Unified CallManager 5.0 and Cisco Unified CallManager Express 3.4 and Survivable Remote Site Telephony (SRST) 3.4 now natively support SIP, effectively opening up the system to an emerging ...

Service provider takeaway: Cisco Unified Communications Manager (CUCM) is the call routing and signaling component of the Cisco Unified Communications solution. This section of the chapter excerpt ...

Cisco s CallManager software provides the necessary functions of call-processing, signaling, and connection services for an AVVID IP telephony solution. Call processing involves the set-up and ...

Telephony Application Programming Interface, or TAPI, allows applications to control the telephone services in Windows. To use TAPI with Cisco CallManager, install the Cisco TAPI Service, or TSP, ...

A high-severity SSRF vulnerability, tracked as CVE-2026-20230, in Cisco Unified Communications Manager Server is now being exploited in attacks. Cisco released security updates for the CVE-2026-20230 ...

Cisco System Inc.’s update to its CallManager IP PBX — introduced this week with native SIP support — will require broader upgrades to other network ...