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 4056568 are also included in the January 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 4056568, the January 2018 Security Only Quality Update, and the January 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 where the Security Monthly Quality Rollup or the Preview of Monthly Quality Rollup from January 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.

Deployment information

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

Security update deployment information: January 9, 2018

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

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 KB 4056568.

File hash information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB4056568-x86.msu

FF1F3EAA06D52B2D274D89FB36DABC92237A71CD

6E9F632D7EC5816529A0BFA305FA3CFCE0A4E47032060DA205B2B7DCE70313F2

Windows8.1-KB4056568-x64.msu

3B577618316C9E30B24E9162DB82A00375E2F9D7

1629DE1542C32D18B3BF699BDA6B64390112D5CFB31BE74109344BB40363C3D5

Windows8-RT-KB4056568-x64.msu

41FD418601679CC6519BF0197CC99ABFEBDA1F9A

47C0C4B390F35B63D5CD58887025327E4424B1EEB6252F274E2A0C332CC38BDB

IE11-Windows6.1-KB4056568-X64.msu

790E710AFAA66B0B5413C171B9AC46CED15E5C28

C53379188E9DCCDB0BDF50BD6884DF6055296B1CCCB251E74AB5B4601B9BC55D

IE11-Windows6.1-KB4056568-X86.msu

08C72F03D35E054C53D23059F372BDB9F7744576

C5A6EAE15E058C7C7E0D30A0B40542480F187DDCFF91E744F008DAE917879479

IE9-Windows6.0-KB4056568-X86.msu

BD8DB8EB7D1571C76FD5118291E62C3568F2ACD3

7F1D14FE84437EB1C06A3CBE43DE3646D0757DE3D4913AEED51A08AC78C20F20

IE9-Windows6.0-KB4056568-X64.msu

BD70F9D42CC754FA427ADC2D92F4E1CD808E7484

B04A53CEFA56B6676FF355DDEE775666520E229FA0C66F0AFCCBB72E78048C84

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