MS06-044

CRITICAL (remote code execution)

A cross site scripting attack against the Microsoft Managment Console (MMC) could be used to inject hostile code on a system used to access the MCC. Only Windows 2000 SP4 appears to be vulnerable, and the exploit is not trivial.

The advisory is a bit vague on how an exploit exactly works. But it appears that the remote site would offer a link. Clicking on the link would open MMC and include the malicious code. It is likely possible to redirect a user to the link via javascript without user interaction.

Urgency:
Clients: HIGH for Windows 2000 SP4. Patch now.
Servers: LOW. Carefully test patch first.