The web interface on Cisco IOS 12.3(8)JA and 12.3(8)JA1, as used on the Cisco Wireless Access Point and Wireless Bridge, reconfigures itself when it is changed to use the "Local User List Only (Individual Passwords)" setting, which removes all security and password configurations and allows remote attackers to access the system.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27437
http://www.vupen.com/english/advisories/2006/2584
http://www.securityfocus.com/bid/18704
http://www.kb.cert.org/vuls/id/544484
http://www.cisco.com/warp/public/707/cisco-sa-20060628-ap.shtml