Vigilante Advisory 2003002 – A flaw in firmware version 12.2(4)JA and earlier of the Cisco Aironet 1100 series allows a malicious remote user to discover which accounts are valid on the targeted Cisco Aironet Access Point by using classical brute force techniques. Exploitation of this flaw is possible if the telnet service is enabled with authentication.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31464/VIGILANTE-2003002.txt
Source: https://packetstormsecurity.com/files/31464/VIGILANTE-2003002.txt.html