Description of the security update for Office Web Apps Server 2013: October 10, 2017


Summary


This security update resolves a vulnerability in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2017-11826.

Note To apply this security update, you must have the release version of Service Pack 1 for Microsoft Office Web Apps Server 2013 installed on the computer.

Improvements and fixes


This security update fixes the following issue:

When you open some PDF files that have certain image encoding in Word Online, the images may be displayed black.

How to get and install the update


Method 1: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Method 2: Microsoft Download Center

You can get the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

More Information


Security update deployment information

For deployment information about this update, see security update deployment information: October 10, 2017.

Security update replacement information

This security update replaces previously released security update KB 3213562.

File hash information

Package Name Package Hash SHA 1 Package Hash SHA 2
wacserver2013-kb4011231-fullfile-x64-glb.exe B753F20966B00742C016CA96F77AA96B1C007F5B C81D77B57DC56626E2D650CDC05EE9C5EF579370A2727B4072D87E0B5AE96914

File information

For the list of files that cumulative update 4011231 contains, download the file information for update 4011231.

How to get help and support for this security update


Help for installing updates: Windows Update FAQ

Security solutions for IT professionals: Security Support and Troubleshooting

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support

Propose a feature or provide feedback on SharePoint: SharePoint User Voice portal