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.
How to Lock Down MHTML in Windows
Visit the Microsoft Support Website and download the fix. On the website it will be labled as Enable, To lock down MHTML.
Run the downloaded msi file, then continue with the rather self-explanatory installer. The setup process will take roughly 3 minutes.
Now your system should be protected from any MHTML exploits.