Severity Rating: Critical
Revision Note: V3.0 (October 13, 2015): Revised bulletin to announce the availability of update packages for Microsoft Office 2016, Microsoft Visio 2016, and Microsoft Word 2016. Customers running Microsoft Office 2016, Microsoft Visio 2016, or Microsoft Word 2016 should apply the applicable updates to be protected from the vulnerabilities discussed in this bulletin. The majority of customers have automatic updating enabled and will not need to take any action because the updates will be downloaded and installed automatically.
Summary: This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.