Severity Rating: Important
Revision Note: V1.1 (July 18, 2016): Bulletin revised to add an Update FAQ to inform customers running Windows Server 2012 that they do not need to install the 3170377 and 3172727 updates in a particular order.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow Secure Boot security features to be bypassed if an attacker installs an affected policy on a target device. An attacker must have either administrative privileges or physical access to install a policy and bypass Secure Boot.