Severity Rating: Critical
Revision Note: V1.1 (February 9, 2016): Revised bulletin to correct the updates replaced for .NET Framework 3.5.1 installed on supported editions of Windows 7 and Windows Server 2008 R2. This is an informational change only. There were no changes to the update files. Customers who have already successfully updated their systems do not need to take any action.
Summary: This security update resolves vulnerabilities in Microsoft Windows, .NET Framework, Microsoft Office, Skype for Business, Microsoft Lync, and Silverlight. The vulnerabilities could allow remote code execution if a user opens a specially crafted document or visits a webpage that contains specially crafted embedded fonts.