Various tech sites has reported that the Mac version of Microsoft Word has flaw that can crash a Windows operating system.

‘The discovery continues a trend of vulnerabilities being seen exploited in the wild shortly after patches for them have been released, the so-called “Exploit Wednesday” effect. It seem likely that this apparent link between patches and exploits is largely attributable to the publicity given to vulnerabilities making exploits for them stand out more sharply from the mass of malcode processed by labs every day,’ said a Technical Consultant at Virus Bulletin.

Source: Virus Bulletin