CVE-2013-5475: Cisco IOS

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco IOS 12.2 through 12.4 and 15.0 through 15.3, and IOS XE 2.1 through 3.9, allows remote attackers to cause a denial of service (device reload) via crafted DHCP packets that are processed locally by a (1) server or (2) relay agent, aka Bug ID CSCug31561.

Affected products

• Cisco IOS: version 12.2 only; version 12.3 only; version 12.4 only; version 15.0 only; version 15.1 only; version 15.2 only; …
• Cisco IOS XE: version 2.1.0 only; version 2.1.1 only; version 2.1.2 only; version 2.2.1 only; version 2.2.2 only; version 2.2.3 only; …

Published 2013-09-27. Last modified 2026-06-16.