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This security update resolves several reported vulnerabilities in Internet Explorer. The most severe of these vulnerabilities could allow remote code execution if a user views a specially crafted webpage in Internet Explorer. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures. Also, this security update includes several nonsecurity-related fixes for Internet Explorer. 

Additionally, see Windows 10 and Windows Server 2016 update history for more information on cumulative updates for Windows 10 and Windows Server 2016.


  • The fixes included in this Security Update for Internet Explorer 4014661 are also included in the April 2017 Security Monthly Quality Rollup. Installing either the Security Update for Internet Explorer or the Security Monthly Quality Rollup installs the fixes that are resolved with this update.

  • If you use update management processes other than Windows Update and you automatically approve all security updates classifications for deployment, this Security Update for Internet Explorer 4014661, the April 2017 Security Only Quality Update, and the April 2017 Security Monthly Quality Rollup are deployed. We recommend that you review your update deployment rules to make sure the desired updates are deployed.

  • This Security Update for Internet Explorer is not applicable for installation on a computer where the Security Monthly Quality Rollup or the Preview of Monthly Quality Rollup from April 2017 (or a later month) is already installed, as those updates contain all fixes in this Security Update for Internet Explorer.

If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Deployment information

For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:

Security update deployment information: April 11, 2017

How to get and install the update

Method 1: Microsoft Update

This update is available through 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.

Note For Windows RT and Windows RT 8.1, this update is available through Microsoft Update only.

Method 2: Microsoft Update Catalog

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

More Information

General distribution release (GDR) fixes Individual updates may not be installed, depending on your version of Windows and the version of the affected application. See the individual articles to determine your update status.

KB number



Elements may overlap when you use the contentEditable div element in Internet Explorer 11


Option to disable VBScript execution in Internet Explorer for Internet Zone and Restricted Sites Zone

Note You must install this Security Update for Internet Explorer 4014661 to have the option to disable VBScript as document in 4012494 on a computer that does not have Windows 10 Creators Update installed.

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

File information

For a list of the files that are provided in this cumulative update, download the file information for cumulative update 4014661.

File name

SHA1 hash

SHA256 hash




























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