Description of the security update for Outlook 2013: January 9, 2018

Applies to: Microsoft Office 2013 Service Pack 1

Summary


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-2018-0791.

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

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions, such as Microsoft Office 365 Home (see Determining your Office version).

Improvements and fixes


This security update contains improvements and fixes for the following nonsecurity issues:

  • Third-party MAPI providers may be blocked despite being in the Outlook profile.

  • When you send an email message from Outlook.com to a recipient outside of Office 365, the recipient always gets a winmail.dat attachment in the message.

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: January 9, 2018.

Security update replacement information

This security update replaces previously released security update KB 4011178.

File hash information

Package Name Package Hash SHA 1 Package Hash SHA 2
outlook2013-kb4011637-fullfile-x64-glb.exe DAE271204657BEE93F95668F379D3652A38D4107 09A59FDA253307DFB66BCDFBD7BDDE96B3653613DDCE4DC157B97432F9E2D761
outlook2013-kb4011637-fullfile-x86-glb.exe 5D81ADA3B8A666097D620A3CD2D7B446C4428BFE 13D27B177102B710FF3035D47B7A84A9F2B569E4F6596B1E39FFA928996EB4E2

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.

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 Office Core: Office User Voice portal