CVE-2008-0531: Cisco Session Initiation Protocol (sip) Firmware

High severity, CVSS 9.3. EPSS: 2.9% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Cisco Unified IP Phone 7940, 7940G, 7960, and 7960G running SIP firmware might allow remote SIP servers to execute arbitrary code via a crafted challenge/response message.

Affected products

• Cisco Session Initiation Protocol (sip) Firmware: any version
• Cisco Skinny Client Control Protocol (sccp) Firmware: any version

Published 2008-02-15. Last modified 2026-06-16.