MS15-046: Description of the security update for Office Web Apps Server 2013: May 12, 2015

Applies to: Office Web Apps Server 2013


This update resolves vulnerabilities in Microsoft Office Web Apps Server 2013 that could allow remote code execution if an authenticated attacker sends specially crafted page content to a targeted computer that is running Microsoft SharePoint Server.

Improvements and fixes

This update also contains fixes for the following nonsecurity issues:

  • When you open and save a workbook that contains Time Grouping data in the Excel Data Model in Excel Web App, the data is lost.
  • Updates the color scheme in PowerPoint Web App. It matches the color scheme when you present a PowerPoint presentation in Skype for Business.


 Microsoft has released security bulletin MS15-046. Learn more about how to obtain the fixes that are included in this security bulletin: 

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 Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

More information about this security update

Download information

This update is available for download from the Microsoft Download Center.

Prerequisites to apply this security update

To install this security update for Office Web Apps Server 2013 Service Pack 1, you must first install update 2949660.

Restart information

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.

Learn about why you may be prompted to restart your computer after you install a security update on a Windows-based computer.

Security update replacement information

This security update replaces security update 2965306.

Removal information

Note We do not recommend that you remove any security update.

To remove this security update, use the Add or Remove Programs item or use the Programs and Features item in Control Panel.

Note When you remove this security update, you may be prompted to insert the disc that contains Microsoft Office. Additionally, you may not have the option to uninstall this security update from the Add or Remove Programs item or the Programs and Features item in Control Panel. There are several possible causes of this issue.

Learn about the ability to uninstall Office updates .

File information

For a list of the files that are provided in this security update 3039748, see the following: