This update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a specially crafted file is opened in an affected version of Microsoft Office.
Microsoft has released security bulletin MS14-017. Learn more about how to obtain the fixes that are included in this security bulletin:
For individual, small business, and organizational users, use the Windows automatic updating feature to install the fixes from Microsoft Update. To do this, see Get security updates automatically on the Microsoft Safety and Security Center website.
For IT professionals, see Microsoft Security Bulletin MS14-017 on the Security TechCenter website.
How to obtain help and support for this security update
Help installing updates: Support for Microsoft Update
Security solutions for IT professionals: TechNet Security Troubleshooting and Support
Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center
Local support according to your country: International Support
More information about this security update
Known issues with this security update
This security update may not install on a computer that is running Microsoft Web Apps Server 2013 if the computer also has Microsoft Office 2013 Service Pack 1 (SP1) installed.
Prerequisites to apply this security update
To apply this security update, you must have Microsoft Office Web Apps Server 2013 installed on the computer.
You may have to restart the computer after you install this security update.
In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, a message is displayed that advises you to restart the computer.
To help reduce the possibility that a restart will be required, stop all affected services and close all applications that may use the affected files before you install this security update.
See Why you may be prompted to restart your computer after you install a security update on a Windows-based computer for more information.
This security update cannot be removed.
Security update replacement information
This security update replaces security update 2863879.
For a list of the files that are provided in this update 2878219, see File information for KB2878219 Office Web Apps Server 2013.csv.