CVE-2007-4293: Cisco IOS

High severity, CVSS 7.1. EPSS: 2% chance of exploitation in the next 30 days.

Cisco IOS 12.0 through 12.4 allows remote attackers to cause a denial of service (device crash) via (1) "abnormal" MGCP messages, aka CSCsd81407; and (2) a large facsimile packet, aka CSCej20505.

Affected products

• Cisco IOS: version 12.0 only; version 12.1 only; version 12.2 only; version 12.3 only; version 12.4 only

Published 2007-08-09. Last modified 2026-06-16.