CVE-2006-4982

Cisco NAC maintains an exception list that does not record device properties other than MAC address, which allows physically proximate attackers to bypass control methods and join a local network by spoofing the MAC address of a different type of device, as demonstrated by using the MAC address of a disconnected printer.

Date published : 2006-09-25

http://www.securityfocus.com/archive/1/446421/100/0/threaded

http://www.insightix.com/files/pdf/Bypassing_NAC_Solutions_Whitepaper.pdf