Description of the security update for Outlook 2010: January 8, 2019

Applies to: Microsoft Office 2010 Service Pack 2


This security update resolves an information disclosure vulnerability that exists when Microsoft Outlook improperly handles certain types of messages. To learn more about the information disclosure vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2019-0559.

Note To apply this security update, you must have the release version of Service Pack 2 for Office 2010 installed on the computer.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2010. It doesn't apply to the Office 2010 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:

  • A Blocked external content warning for Secure/Multipurpose Internet Mail Extensions (S/MIME) email messages that have no external content is displayed in Outlook 2010.

  • Mail delivery rules stop working. When you try to open the Manage Rules and Alerts dialog box, you receive the following error message:

    The operation failed because of a registry or installation problem. Restart Outlook and try again. If the problem persists, reinstall.

    How to get and install the update

    Method 1: Microsoft Update

    This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, 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 8, 2019.

    Security update replacement information

    This security update replaces previously released update KB 4461576.

    File hash information

    File name SHA1 hash SHA256 hash
    outlookloc2010-kb4461623-fullfile-x86-glb.exe B14EE23AA5285A904948B5EF3C67417EA1247FB9 C56336582EE249737933C921BBB94A0CDBBE51A29D132559CB7C310122BFF98D
    outlookloc2010-kb4461623-fullfile-x64-glb.exe 898B88DE722EF05C6D3A7A857CC112DC248C834A 6D80F4666508938114B323EE8EF51B0A7521AEFB0AB15727D58E63A282434B98

    File information

    The English (United States) version of this software update installs files that have the 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: Protect yourself online

    Help for protecting your Windows-based computer from viruses and malware: Microsoft Security

    Local support according to your country: International Support