On Friday both Microsoft and Google published an advisory regarding limited, targeted attacks. The exploit takes advantage of a loophole in Windows MHTML [MIME(Multipurpose Internet Mail Extensions) HTML],which is a format used to combine web page contents into a single file. Microsoft released a fix that locks down MHTML to prevent abuse, but it’s only a temporary solution. If you are worried about being hacked though, you could apply it while we wait for a real patch.