Severity Rating: Critical
Revision Note: V1.1 (January 13, 2016): Corrected severity and impact entries for Windows 10 in the Affected Software and Vulnerability Severity Ratings table. This is an informational change only. Customers who have successfully installed the update do not need to take any further action.
Summary: This security update resolves vulnerabilities in Microsoft Windows. The more severe of the vulnerabilities could allow remote code execution if an attacker convinces a user to visit a malicious website.