CVE-2011-2578: Cisco IOS

High severity, CVSS 7.8. EPSS: 2.7% chance of exploitation in the next 30 days.

Memory leak in Cisco IOS 15.1 and 15.2 allows remote attackers to cause a denial of service (memory consumption) via malformed SIP packets on a NAT interface, aka Bug ID CSCts12366.

Affected products

• Cisco IOS: version 15.1 only; version 15.2 only

Published 2012-05-02. Last modified 2026-06-16.