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WinRAR flaw lets hackers run programs when you open RAR archives
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
On a very very rare occasion I've had to use it for scene cracks as other apps didn't work. They use WinRAR to archive it so on those very rare occasions it's the only thing that unpacks it
WinRAR also lets you delete files from a RAR archive, 7zip does not.