MS15-033: Description of the security update for SharePoint Server 2010 Office Web Apps: April 14, 2015

Applies to: SharePoint Server 2010Excel Web AppLync Web App


This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if an attacker convinces a user to open or preview a specially crafted Office file in an affected version of Office.

Improvements and fixes

This update also contains a fix for the following nonsecurity issue:

New modules are not displayed in the Document Inspector dialog box and backstage in some localized versions of Office 2010 applications.


Microsoft has released security bulletin MS15-033. Learn more about how to obtain the fixes 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 support and troubleshooting

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 apply this security update, you must have Service Pack 2 for Office Web Apps 2010  installed on the computer.

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.

Removal information

This security update cannot be removed.

Security update replacement information

This security update replaces previously released update 2956069.