CVE-2006-4983

CVE-2006-4983 describes a vulnerability in Cisco Network Access Control (NAC) where quarantined devices can bypass security controls by tunneling network traffic through DNS, DHCP, or EAPoUDP. This allows attackers to circumvent isolation measures. With a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with low complexity and no authentication, potentially leading to unauthorized access, information disclosure, and denial of service. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.