Microsoft has released the Out of Band security bulletin MS10-046 this morning. Make sure you download this and get it installed ASAP if your OS is affected. The OoB updates are especially important, they were so critical they release them ahead of schedule of a scheduled patch release. Grab it!
This security update resolves a publicly disclosed vulnerability in Windows Shell. The vulnerability could allow remote code execution if the icon of a specially crafted shortcut is displayed. An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
This security update is rated Critical for all supported editions of Microsoft Windows. For more information, see the subsection, Affected and Non-Affected Software, in this section.