Microsoft release Cumulative Update KB5006670 for Windows 10

Home » Microsoft

Reading time icon 3 min. read

Calendar icon Published on

by Surur Davids 

published on

Share this article

Readers help support MSpoweruser. We may get a commission if you buy through our links. Tooltip Icon

Read our disclosure page to find out how can you help MSPoweruser sustain the editorial team Read more

Microsoft Windows 10 new

It’s Patch Tuesday and today Microsoft released KB5006670 for all supported versions of Windows 10.

The update takes  Windows 10, version 2004 to 19041.1288, Windows 10, version 20H2 to build 19042.1288 and Windows 10, version 21H1 to build 19043.1288.

The update mainly includes security updates for Windows 10.

This security update includes quality improvements. Key changes include:

  • Addresses an issue that prevents some applications, such as Microsoft Office and Adobe Reader, from opening or causes them to stop responding. This occurs on devices that are subject to Microsoft Exploit Protectionfor Export Address Filtering (EAF).

For more information about the resolved security vulnerabilities, please refer to the new Security Update Guide website and the October 2021 Security Updates.

It has the following Known Issues.

Symptom Workaround
Devices with Windows installations created from custom offline media or custom ISO image might have Microsoft Edge Legacy removed by this update, but not automatically replaced by the new Microsoft Edge. This issue is only encountered when custom offline media or ISO images are created by slipstreaming this update into the image without having first installed the standalone servicing stack update (SSU) released March 29, 2021 or later.

Note Devices that connect directly to Windows Update to receive updates are not affected. This includes devices using Windows Update for Business. Any device connecting to Windows Update should always receive the latest versions of the SSU and latest cumulative update (LCU) without any extra steps.

 To avoid this issue, be sure to first slipstream the SSU released March 29, 2021 or later into the custom offline media or ISO image before slipstreaming the LCU. To do this with the combined SSU and LCU packages now used for Windows 10, version 20H2 and Windows 10, version 2004, you will need to extract the SSU from the combined package. Use the following steps to extract the using SSU:

  1. Extract the cab from the msu via this command line (using the package for KB5000842 as an example): expand Windows10.0-KB5000842-x64.msu /f:Windows10.0-KB5000842-x64.cab <destination path>
  2. Extract the SSU from the previously extracted cab via this command line: expand Windows10.0-KB5000842-x64.cab /f:* <destination path>
  3. You will then have the SSU cab, in this example named SSU-19041.903-x64.cab. Slipstream this file into your offline image first, then the LCU.

If you have already encountered this issue by installing the OS using affected custom media, you can mitigate it by directly installing the new Microsoft Edge. If you need to broadly deploy the new Microsoft Edge for business, see Download and deploy Microsoft Edge for business.
After installing the June 21, 2021 (KB5003690) update, some devices cannot install new updates, such as the July 6, 2021 (KB5004945) or later updates. You will receive the error message, “PSFX_E_MATCHING_BINARY_MISSING”. For more information and a workaround, see KB5005322.

You can download the update by Checking for Updates in Settings or by downloading it from the Update Catalogue here.

Surur Davids

Surur Davids Shield

Smartphone Expert

Surur Davids is the founder of WMPoweruser which later became MSPoweruser.com. He's a smartphone expert with over a decade of experience.

User forum

0 messages