Severity Rating: Important
Revision Note: V1.0 (July 8, 2014): Bulletin published
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker first exploits another vulnerability in a low integrity process and then uses this vulnerability to execute specially crafted code in the context of the logged on user. By default, the modern, immersive browsing experience on Windows 8 and Windows 8.1 runs with Enhanced Protected Mode (EPM). For example, customers using the touch-friendly Internet Explorer 11 browser on modern Windows tablets are using Enhanced Protected Mode by default. Enhanced Protected Mode uses advanced security protections that can help mitigate against exploitation of this vulnerability on 64-bit systems.