MS13-008 is live for download. Due to the availability of exploits treat with the highest priority and install as quickly as possible.
Please note that this update is a real patch and not a cumulative update, as we are used to for typical Internet Explorer updates. It is highly recommended to have MS12-077 (the last cumulative Internet Explorer update) installed before applying MS13-008.
Microsoft has posted an advance notification for an Internet Explorer update that will be released later today. The update will address the current 0-day vulnerability (CVE-2012-4792) that was first detected in late December 2012.