Severity Rating: Critical
Revision Note: V1.2 (August 12, 2016): Bulletin revised to correct the updates replaced for Window 8.1, Windows Server 2012, and Windows Server 2012 R2. Bulletin revised to remove Windows 10 version 1607 from the affected software table because it is not affected. This is an informational change only. Customers who have already successfully installed the update do not need to take any action.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user views specially crafted PDF content online or opens a specially crafted PDF document. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.