Cisco Security Advisory 2004040 – 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.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33032/cisco-sa-20040407-username.txt
Source: https://packetstormsecurity.com/files/33032/Cisco-Security-Advisory-20040407-username.html