CVE-2007-1833: The Skinny Call Control Protocol (SCCP) implementation in Cisco Unified CallManager (CUCM) 3.3 before 3.3(5...

Security readout for executives and security teams

This is an old Cisco Unified CallManager vulnerability that could let a remote attacker disrupt voice services. The business risk is phone outage, not data theft. It matters most where legacy CUCM still supports business, call center, or emergency voice workflows. Exposure is likely limited to organizations still running the named legacy CUCM versions with SCCP or SCCPS reachable by untrusted networks. Internet exposure is not stated in the sources and should be verified locally. Treat as a legacy voice-availability risk. Remediate promptly if affected CUCM systems remain in service, especially in environments where phone outages materially affect operations or safety. Mitigation focus: Upgrade affected CUCM versions to the fixed releases identified by Cisco guidance.; Restrict SCCP and SCCPS access to trusted voice networks and required devices.; Review vendor advisory for version-specific remediation and operational caveats..

Prepared

Jun 29, 2026, 06:24 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.