CVE-2008-3799: Cisco IOS

High severity, CVSS 7.8. EPSS: 3.1% chance of exploitation in the next 30 days.

Memory leak in the Session Initiation Protocol (SIP) implementation in Cisco IOS 12.2 through 12.4, when VoIP is configured, allows remote attackers to cause a denial of service (memory consumption and voice-service outage) via unspecified valid SIP messages.

Affected products

• Cisco IOS: version 12.2 only; version 12.3 only; version 12.4 only

Published 2008-09-26. Last modified 2026-06-16.