A default username/password pair is present in all releases of the Wireless LAN Solution Engine (WLSE) and Hosting Solution Engine (HSE) software. A user who logs in using this username has complete control of the device. This username cannot be disabled. There is no workaround.

This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040407-username.shtml.

Thanks to slashdot

egghead