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 4230450) are also included in the June 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 4230450), the June 2018 Security Only Quality Update, and the June 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 June 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 for this update

Known issue

Resolution

The updates for Internet Explorer were not being detected as required in Windows Server Update Services (WSUS)

This issue has been resolved, and an updated scan file (Wsusscn2.cab) has been released. We recommend downloading the latest version of this file.

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

File information

For a list of the files that are provided in this cumulative update, download the file information for cumulative update 4230450.

Deployment information

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

Security update deployment information: June 12, 2018

File hash information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB4230450-x86.msu

9BA6C317DAA29B8B9948F9AAE2FB3855E7EB1F5F

B9489BBB9B2D2656620B93279E5E21874D25BBE8EF5BE86F2B8A1A99EA29FA61

Windows8.1-KB4230450-x64.msu

74FD7598EB05AA9D70D3C49F3931209F251A6EEA

635703015E34AC2EB106C0D845E8C9E3552C9098C114FC4D92E9717C4F73DDBB

Windows8-RT-KB4230450-x64.msu

AB23E446E34C483B8D5D4793E25C129F5FF83A22

C6DE2D36BA6C9D106448D52DB75D9ABEB78D42F960C4C7DE42F56417902B510C

IE11-Windows6.1-KB4230450-X64.msu

15E3DB473D1629895526A03C721649289E0B5799

A941756C767ECE90A1079F78336314185B0BCFB4075F2258286004227223D81F

IE11-Windows6.1-KB4230450-X86.msu

1DE8C38BD18224DF85B002E3CB808CD9CAA11BA2

66287E2DAD9516FCAAC81805488CB15D5C049493F06605CFC5830C4187B47139

IE9-Windows6.0-KB4230450-X86.msu

79F205242DC762BBA05CD380E1D6E4A96069BAF9

4859B29D5B07F134972334C3CF620E8F47294350F2E954F1E20486E071B3EE11

IE9-Windows6.0-KB4230450-X64.msu

EA1A83130778A2D0B4A62170DB65959874B643F0

693EC0093C3A43E806B828A6861974C23E917CDCBD07275F4CCE77727904BF4D

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