Unspecified vulnerability in Safari 4 on Apple Mac OS X 10.6 allows remote attackers to execute arbitrary code via unknown vectors, as demonstrated by Charlie Miller during a Pwn2Own competition at CanSecWest 2010.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2010-1151
http://twitter.com/thezdi/statuses/11002504493