Apparently Microsoft saw this as a serious enough flaw that it immediately released a Fix-It for this vulnerability. It dealt with a shell vulnerability which can impact a huge number of critical infrastructure PC's, and was an easy one to implement by hackers. You should also take advantage and patch your own PC as soon as possible. The Fix-It tools are becoming a good way for end-users as well as IT staff to quickly apply patches.

Microsoft Fix-IT For Shell Vulnerability

Security Gurus Scream for Microsoft Shell Patch