Description of the security update for Outlook 2013: November 13, 2018

Applies to: Outlook 2013Microsoft Outlook 2013 Service Pack 1


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-2018-8522Microsoft Common Vulnerabilities and Exposures CVE-2018-8524Microsoft Common Vulnerabilities and Exposures CVE-2018-8576 and Microsoft Common Vulnerabilities and Exposures CVE-2018-8582.
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:
  • When the primary email address and User Principal Name (UPN) are changed in Active Directory or Azure Active Directory, the old Simple Mail Transfer Protocol (SMTP) address and the UPN in a user's Outlook profile file are not changed. 
  • You can't switch between accounts on a custom form by using the Accounts button.
  • When running Outlook 2013 in online mode, "Cc" recipients may not appear in the email message.
  • This update also enables support for Transport Layer Security (TLS) version 1.2 for Internet Message Access Protocol (IMAP), Post Office Protocol (POP), and Simple Mail Transfer Protocol (SMTP) connections.

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: November 13, 2018.

Security update replacement information

This security update replaces previously released security update KB 4092477.

File hash information
File name SHA1 hash SHA256 hash
outlook2013-kb4461486-fullfile-x86-glb.exe A4EE6B67B752EED2D91F3D8BA6D7A6C7ACF9E1CF 7FDC821D7D4EF5A4793CCFCBF14541AAF41EC045341139803DE2F41AC4A7D3B2
outlook2013-kb4461486-fullfile-x64-glb.exe 9DA35D6C6CBD40793E88BB13ECAA36AA70DD7A28 8E0F775F168827E313644DF1E5C85ACD825BF72BC5319EEC791E9B0905C78A05
File information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. 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

Protect yourself online and at home: Windows Security support
Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure
Local support according to your country: International Support