Last year, only Apple and Google updated their browsers just before Pwn2Own. Mozilla acknowledged a critical vulnerability in Firefox less than a week before 2010's contest, but said it wouldn't fix the flaw in time for the challenge. Pwn2Own organizers later ruled that Firefox vulnerability off limit.
Assuming Apple updates Safari, of the four Pwn2Own-targeted browsers, only Internet Explorer (IE) will remain unpatched in the days leading up to the contest. Microsoft last issued fixes for IE flaws on Feb. 8 as part of its monthly Patch Tuesday.
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