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.

• Download the security update KB4011231 for the 64-bit version of Office Web Apps Server 2013

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 FAQSecurity solutions for IT professionals: Security Support and TroubleshootingHelp for protecting your Windows-based computer from viruses and malware: Microsoft SecureLocal support according to your country: International Support

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