Description of the security update for Office Web Apps Server 2013: June 13, 2017


This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2017-8509, Microsoft Common Vulnerabilities and Exposures CVE-2017-8511, and Microsoft Common Vulnerabilities and Exposures CVE-2017-8512.

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.

How to get and install the update

Method 1: Microsoft Update

Method 2: Microsoft Update Catalog

Method 3: Microsoft Download Center

More Information

Security update deployment information

For deployment information about this update, see security update deployment information: June 13, 2017.

Security update replacement information

This security update replaces previously released security update KB3191888.

File hash information

Package Name Package Hash SHA 1 Package Hash SHA 2
wacserver2013-kb3203391-fullfile-x64-glb.exe 607990C26CF9CF22D21943C20AF7FA33E4A8950F 053F5EAC15255DF9F01A5E21B8A4104608EDB7E89E991ED641C0AA389920349D

File information

For a list of the files that are provided in this update KB3203391, download the file information for update KB3203391

How to get help and support for this security update

Help for installing updates: Windows Update FAQ

Security solutions for IT professionals:
TechNet 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 Office Core: Office User Voice portal