Microsoft recently patched a critical flaw in the way Windows renders certain types of graphic files. To no avail, as just days later a hacker has published two new WMF bugs that exploit the same part of the Windows OS.
However, the new exploitations are far less dangerous than last week's incident, according to computer security analysts. The new bugs could cause the WMF-viewing software to crash, rather than taking control of the PC.
One security analyst said: "New malformed images that simply crash things aren't really that important unless they can be shown to cause code to execute. This is only getting any attention because its WMF and Microsoft just released a WMF patch."