A newly discovered flaw in the handling of TIFF image files effects machines running Windows Vista or Server 2008 as well as Office 2003 to 2010 and Microsoft Lync products on WinXP and Win7 with Windows 8 being the only one that does not contain this vulnerability.  According to The Register attack code is launched when the image is display with tricks the "OS into copying malicious code stashed in the file into memory and then hijacking the processor to execute it."

"The software giant said the flaw allows attackers to remotely execute code and install malware on a vulnerable system by sending an email or instant message or convincing a user to open a specially crafted webpage."

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