Adobe on Thursday patched a critical bug in Adobe Reader, its popular PDF viewer, beating its self-imposed deadline by several days.

Hackers have already begun exploiting the bug in malicious PDF files, Adobe confirmed.

Adobe owned up to a Flash Player flaw last week after an independent researcher found exploits in embedded Flash files within Microsoft Word and Excel files attached to emails.

It was the second time in four weeks that Adobe had to acknowledge a Flash "zero-day," or unpatched vulnerability that hackers were exploiting.

More: http://www.computerworld.com/s/article/9216062/