Cumulative security update for Internet Explorer: August 14, 2018

Applies to: Internet Explorer 9

Summary


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.  

Additionally, see the following articles for more information about this cumulative update:

Important 

  • The fixes that are included in this Security Update for Internet Explorer (KB 4343205) are also included in the August 2018 Security Monthly Quality Rollup. Installing either the Security Update for Internet Explorer or the Security Monthly Quality Rollup installs the fixes that are in 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 (KB 4343205), the August 2018 Security Only Quality Update, and the August 2018 Security Monthly Quality Rollup are deployed. We recommend that you review your update deployment rules to make sure that the desired updates are deployed.

  • This Security Update for Internet Explorer is not applicable for installation on a computer on which the Security Monthly Quality Rollup or the Preview of Monthly Quality Rollup from August 2018 (or a later month) is already installed. This is because those updates contain all the fixes that are 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.

Known issues


Symptom

Workaround

In Internet Explorer 11, a blank page may appear for some redirects. Additionally, if you open a site that uses Active Directory Federation Services (AD FS) or Single sign-on (SSO), the site may be unresponsive.

Refreshing the address bar URL may allow the page to finally load completely.

To resolve this issue, apply update KB4459022.

After installing this update, you may observe decreased performance in Internet Explorer 11 when roaming profiles are used or when the Microsoft Compatibility List is not used. This issue is resolved in KB4463376.

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.

Deployment information


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

Security update deployment information: August 14, 2018

More Information


File information


For a list of the files that are provided in this cumulative update, download the file information for cumulative update 4343205.