CVE-2006-4983: Cisco Network Access Control

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

Cisco NAC allows quarantined devices to communicate over the network with (1) DNS, (2) DHCP, and (3) EAPoUDP, which allows attackers to bypass control methods by tunneling network traffic through one of these protocols.

Affected products

• Cisco Network Access Control: any version

Published 2006-09-26. Last modified 2026-06-16.