Internet Explorer 6, 7, 8, 9 and 10 are the recipients of a patch that can prevent an exploit that enables remote code execution in the browser. This affects all Windows operating systems except XP. A second bulletin deals with another IE vulnerability believed to be one disclosed in March at the annual Pwn2Own hacking competition. The remaining eight patches will address flaws that range from denial-of-service errors that can cause Windows to crash. At least four of the patches require a restart, Microsoft said.
Source: https://thehackernews.com/2013/05/microsoft-patch-tuesday-to-fix-critical.html