<A target="_blank" href="http://searchsecurity.techtarget.com/news/article/0,289142,sid14_gci1350496,00.html?track=sy160">Adobe has issued a critical update</A> plugging a zero-day vulnerability in Acrobat Reader being actively exploited by attackers. This first patch is for Adobe Reader 9.1 and Acrobat 9.1. Updates for versions 7 and 8 are expected next week.