• 10 March, 2021
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Windows 10 Cumulative Updates KB5000808 & KB5000802 Released

As part of the March Patch cycle, Microsoft is rolling out a new cumulative update for all supported version of Windows.

The cumulative update with security fixes is rolling out to PCs with October 2020 Update, May 2020 Update, November 2019 Update, and May 2019 Update. In this month’s update, there are only security enhancements for the system, browsers, core components and other basic functions.

Like every Windows Update, you can open the Settings app and click on the Windows Update option to install the patches. If you own multiple PCs or if you would like to patch the PCs manually, you can learn more about it here.

Below is the list of all new updates for Windows 10:

• Windows 10 version 1507 — KB5000807 (OS Build 10240.18874)
• Windows 10 version 1607 — KB5000803 (OS Build 14393.4283)
• Windows 10 version 1703 — KB5000812 (OS Build 15063.2679) (NEW 3/9/21 End of support for Windows 10, version 1703 )
• Windows 10 version 1709 — EOS
• Windows 10 version 1803 — KB5000809 (OS Build 17134.2087)
• Windows 10 version 1809 — KB5000822 (OS Build 17763.1817)
• Windows 10 version 1909 — KB5000808 (OS Build 18363.1440) (see v1903 EOS note in the change list)
• Windows 10 version 2004 and 20H2 — KB5000802 (OS Builds 19041.867 and 19042.867). (For those who are running 21H1 in the Beta Channel, see here)

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What’s new in OS Builds 19041.867 and 19042.867

The cumulative update for Windows 10, version 2004 and 20H2 is KB 5000802 and it comes with these fixes:

• Updates to improve security when Windows performs basic operations.
• Updates to improve security when using Microsoft Office products.
• Updates security for the Windows user interface.
• Addresses an elevation of privilege security vulnerability documented in CVE-2021-1640 related to print jobs submitted to “FILE:” ports. After installing Windows updates from March 9, 2021 and later, print jobs that are in a pending state before restarting the print spooler service or restarting the OS will remain in an error state. Manually delete the affected print jobs and resubmit them to the print queue when the print spooler service is online.
• Security updates to the Windows Shell, Windows Fundamentals, Windows Management, Windows Apps, Windows User Account Control (UAC), Windows Virtualization, the Windows Kernel, the Microsoft Graphics Component, Internet Explorer, Microsoft Edge Legacy, and Windows Media.

In addition to these fixes, Microsoft noted that the patch also includes quality improvements to the servicing stack, which is the component that installs Windows updates.

What’s new in Build 18363.1440 for version 1909

For those still using Windows 10 version 1909, they’ll be getting KB 5000808 with the following security fixes:

• Updates security for the Windows user interface.
• Updates to improve security when Windows performs basic operations.
• Updates to improve security when using Microsoft Office products.
• Addresses an elevation of privilege security vulnerability documented in CVE-2021-1640 related to print jobs submitted to “FILE:” ports. After installing Windows updates from March 9, 2021 and later, print jobs that are in a pending state before restarting the print spooler service or restarting the OS will remain in an error state. Manually delete the affected print jobs and resubmit them to the print queue when the print spooler service is online.
• Security updates to the Windows Shell, Windows Fundamentals, Windows Management, Windows Apps, Windows User Account Control (UAC), Windows Core Networking, Windows Hybrid Cloud Networking, Windows Virtualization, the Windows Kernel, the Microsoft Graphics Component, Internet Explorer, Microsoft Edge Legacy, and Windows Media.

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Symptom

Workaround

System and user certificates might be lost when updating a device from Windows 10, version 1809 or later to a later version of Windows 10. Devices will only be impacted if they have already installed any Latest cumulative update (LCU) released September 16, 2020 or later and then proceed to update to a later version of Windows 10 from media or an installation source which does not have an LCU released October 13, 2020 or later integrated. This primarily happens when managed devices are updated using outdated bundles or media through an update management tool such as Windows Server Update Services (WSUS) or Microsoft Endpoint Configuration Manager. This might also happen when using outdated physical media or ISO images that do not have the latest updates integrated.Note Devices using Windows Update for Business or that connect directly to Windows Update are not impacted. Any device connecting to Windows Update should always receive the latest versions of the feature update, including the latest LCU, without any extra steps.

If you have already encountered this issue on your device, you can mitigate it within the uninstall window by going back to your previous version of Windows using the instructions here. The uninstall window might be 10 or 30 days depending on the configuration of your environment and the version you’re updating to. You will then need to update to the later version of Windows 10 after the issue is resolved in your environment. Note Within the uninstall window, you can increase the number of days you have to go back to your previous version of Windows 10 by using the DISM command /Set-OSUninstallWindow. You must make this change before the default uninstall window has lapsed. For more information, see DISM operating system uninstall command-line options.We are working on a resolution and will provide updated bundles and refreshed media in the coming weeks.