The web server in Belkin Wireless G Plus MIMO Router F5D9230-4 does not require authentication for SaveCfgFile.cgi, which allows remote attackers to read and modify configuration via a direct request to SaveCfgFile.cgi.
https://www.exploit-db.com/exploits/4941
https://exchange.xforce.ibmcloud.com/vulnerabilities/39793
http://www.vupen.com/english/advisories/2008/0215
http://www.securityfocus.com/bid/27359
http://www.securityfocus.com/archive/1/486748/100/0/threaded