The default configuration of the America Online (AOL) client software allows all users to modify a certain registry value that specifies a DLL file name, which might allow local users to gain privileges via a Trojan horse program.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24498
http://www.securityfocus.com/bid/16453
http://www.securityfocus.com/archive/1/423587/100/0/threaded