Microsoft is working on a patch to prevent exploits of a newly discovered vulnerability that affects all versions of Windows.
Microsoft acknowledged the flaw in a security advisory Friday, while offering a workaround, but not a patch. Microsoft updated the advisory on Monday with a short statement that "Microsoft is currently working to develop a security update for Windows to address this vulnerability."
Microsoft recently allowed one vulnerability affecting an older version of Office to go unpatched, but since the latest exploit affects all versions of Windows it would be highly unlikely for Microsoft to not issue a permanent fix.