Description of the security update for Microsoft Office Viewers and Office Compatibility Pack: May 8, 2018

Applies to: PowerPoint ViewerExcel ViewerOffice Compatibility Pack Service Pack 3


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-2018-8160.

Note To apply this security update, you must have the release version of Microsoft Office Compatibility Pack Service Pack 3, Excel Viewer, or PowerPoint Viewer installed on a computer that is running Windows Embedded POSReady 2009.

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

Method 3: 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: May 8, 2018.

Security update replacement information

This security update replaces previously released security update KB 4011715.

File hash information

Package name Package hash SHA 1 Package hash SHA 2
mso2007-kb4018308-fullfile-x86-glb.exe 2AC4C33CC252E0E482DFFE7AD9FE7A168182E4E7 D593D7919D03819DE121902A8F05CFEB2CC1341B2BC423B7D75E333D096086C8

File information

The English version of this security update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

For all supported x86-based versions of Office Viewers and Office Compatibility Pack

File identifier File name File version File size Date Time
mso.dll mso.dll 12.0.6798.5000 17,407,208 19-Apr-2018 03:31

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