Untrusted search path vulnerability in Apple Safari 4.x before 4.1.2 and 5.x before 5.0.2 on Windows allows local users to gain privileges via a Trojan horse explorer.exe (aka Windows Explorer) program in a directory containing a file that had been downloaded by Safari.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11956
http://www.securityfocus.com/bid/43048
http://support.apple.com/kb/HT4333
http://lists.apple.com/archives/security-announce/2010//Sep/msg00001.html