Cumulative security update for Internet Explorer: September 8, 2020

Applies to: Internet Explorer 11 on Windows Server 2012 R2Internet Explorer 11 on Windows Server 2012Internet Explorer 11 on Windows Server 2008 R2 SPTag


This security update resolves vulnerabilities in Internet Explorer. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures.

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


  • The fixes that are included in this update are also included in the September 2020 Security Monthly Quality Rollup. Installing either this update or the Security Monthly Quality Rollup installs the same fixes.
  • This update is not applicable for installation on a device on which the Security Monthly Quality Rollup or the Preview of Monthly Quality Rollup from September 2020 (or a later month) is already installed. This is because those updates contain all the same fixes that are included in this update.
  • If you use update management processes other than Windows Update and you automatically approve all security update classifications for deployment, this update, the September 2020 Security Only Quality Update, and the September 2020 Security Monthly Quality Rollup are deployed. We recommend that you review your update deployment rules to make sure that the desired updates are deployed.
  • 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 in this update

We are currently not aware of any issues in this update.

How to get and install this update

Before installing this update

To install Windows 7 SP1, Windows Server 2008 R2 SP1, or Windows Server 2008 SP2 updates released on or after July 2019, you must have the following required updates installed. If you use Windows Update, these required updates will be offered automatically as needed.

Important You must restart your device after you install these required updates.

Install this update

To install this update, use one of the following release channels.

Release Channel Available Next Step
Windows Update and Microsoft Update Yes

None. This update will be downloaded and installed automatically from Windows Update for  the following versions:

  • Internet Explorer 11 for Windows Server 2012 and Windows Embedded 8 Standard

For all other versions, see the other options below.

Microsoft Update Catalog Yes To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS) Yes

This update will automatically synchronize with WSUS if you configure Products and Classifications as follows:

Product: Windows Server 2008 Service Pack 2, Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1, Windows Server 2012, Windows Embedded 8 Standard, Windows 8.1, Windows Server 2012 R2

Classification: Security Updates

File information

File verification

File attributes

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2

Windows Server 2012

Windows 7 and Windows Server 2008 R2

Windows Server 2008

Information about protection and security


Learn about the terminology that Microsoft uses to describe software updates.