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 target SharePoint Server.
Microsoft has released security bulletin MS14-022. 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.
To install this security update for Office Web Apps Server 2013 Service Pack 1, you must first install the following update:
2949660 MS14-017: Vulnerabilities in Microsoft Word and Office Web Apps could allow remote code execution: April 8, 2014
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.
This security update replaces the following update:
2878219 MS14-017: Description of the security update for Office Web Apps Server 2013: April 8, 2014
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 for this issue.