The web server for D-Link Wireless Access-Point (DWL-2100ap) firmware 2.10na and earlier allows remote attackers to obtain sensitive system information via a request to an arbitrary .cfg file, which returns configuration information including passwords.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26973
http://www.vupen.com/english/advisories/2006/2186
http://www.securityfocus.com/bid/18299
http://www.securityfocus.com/archive/1/489009/100/0/threaded
http://www.securityfocus.com/archive/1/436281/100/0/threaded
http://www.intruders.org.br/adv0206en.html
http://www.intruders.com.br/adv0206en.html
http://www.gnucitizen.org/projects/router-hacking-challenge/