Unspecified vulnerability in Internet Explorer 8 on Microsoft Windows 7 allows remote attackers to execute arbitrary code via unknown vectors, possibly related to a use-after-free issue, as demonstrated by Peter Vreugdenhil during a Pwn2Own competition at CanSecWest 2010.
https://exchange.xforce.ibmcloud.com/vulnerabilities/57197
http://twitter.com/thezdi/statuses/11003801960