The Security Corporation has warned AirPort users to administrate their Base Stations directly from a Mac using a cross-over Ethernet cable.
The corporation says: "In environments where this is not practical, it is advised that the AirPort base Station be managed through the Ethernet network, and not the wireless network."
If the advice is not followed, security may be compromised, it warns: "If an AirPort is administered over the Ethernet interface or via an insecure, non-WEP, wireless connection, an anonymous attacker can obtain administrative access to the AirPort. If WEP is enabled, then the attack is limited to WEP authenticated attackers."
WEP (Wired Equivalent Privacy) is a security protocol for wireless local-area networks, and is defined in the 802.11b standard. It encrypts data shared over the wireless network, offering some protection to that data. It does not, however, offer total security.
The report is available here.