In summation:
Only a problem when you administer your Base Station.
http://www.atstake.com/research/advisories/2003/a051203-1.txtRecommendation:
The only way to securely administer the AirPort Base Station is by
connecting to it via a cross-over cable. 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.
Only a problem when you administer your Base Station.