CVE-2007-4286: Cisco IOS

High severity, CVSS 9.3. EPSS: 19.4% chance of exploitation in the next 30 days.

Buffer overflow in the Next Hop Resolution Protocol (NHRP) functionality in Cisco IOS 12.0 through 12.4 allows remote attackers to cause a denial of service (restart) and execute arbitrary code via a crafted NHRP packet.

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.