Cumulative security update for Internet Explorer: August 14, 2018

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:

• Windows 7 SP1 and Windows Server 2008 R2 SP1 update history
• Windows Server 2012 update history
• Windows 8.1 and Windows Server 2012 R2 update history
• Windows 10 and Windows Server 2016 update history

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

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How to get help and support for this security update

Help for installing updates: Windows Update: FAQSecurity solutions for IT professionals: TechNet Security Support and TroubleshootingHelp for protecting your Windows-based computer from viruses and malware: Microsoft SecureLocal support according to your country: International Support

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

File hash information

File name	SHA1 hash	SHA256 hash
Windows8.1-KB4343205-arm.msu	31615EDDA9EF07B2590A8347B9211A957C863218	54064E3C9F4C190B382AFA79E8BB26E7453039FA110BFCF23419DD6EFB42F336
Windows8.1-KB4343205-x86.msu	272963AC6B592B1763793C6DCFE500F156E033D4	8A1F5E6BC5773B6D3C25714B1F051DF5ECC3FBC96222769B69A0E3A5BF5C3E35
Windows8.1-KB4343205-x64.msu	79C8CC1B7816FE6538B7A07F2D91FB4EF3E03151	B32BEB09702FAA123872816E07403BABE589D21CD172D41E8DA1C7F15844C323
Windows8-RT-KB4343205-x64.msu	A8ADE65F495083C92FD58F352B46FE5590BE9AEA	98EDD1CA4C4B61AEC631F609C52C0C52A95F30358C9BAC755575E193A37927C9
IE11-Windows6.1-KB4343205-X64.msu	C42CDA12A762231114883CCD7322A29FB2146036	664F70E129D78679C28253059118E2BA71DC55C75D108BC2C493A051B8A4D34C
IE11-Windows6.1-KB4343205-X86.msu	35F20D3A0A053949A1E514D27018CC3D39055455	781205BF1EFE1150E5628663D50005703D96D4D92E615A4333657D03D887F7AD
IE9-Windows6.0-KB4343205-X86.msu	47CCB42BECC066C4394E871759532F18CAF9EEDE	B9B80CDEB6698B9039C76410CE3926EAE01760611DE6630C25EE31E23A0D1D8D
IE9-Windows6.0-KB4343205-X64.msu	B118B05F41E74C73F0CFCEDC86B7F01CDDDB0106	484232CA3550BA3420B2FA9E89FEDE2876FB1CA715019B20EFF03E7CE6C3592D