(Video) [KB5000802] Cumulative update for Windows 10 version 20H2 - March 2021 Patch Tuesday!
It's Patch Tuesday, and that means it's time for security updates! Pretty much every supported Microsoft product is getting an update today, and that includes most versions of Windows 10. If you're a regular consumer, you'll be getting an update for Windows 10 version 1909 and above.
If you're on Windows 10 version 2004 or 20H2, you'll get KB5000802, bringing the build number to 19041.867 or 19042.867, respectively. You'll also get this update if you're a Windows Insider on the Beta (if you're testing 21H1) or Release Preview channel. These are the highlights:
● 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.
Here's the full list of fixes:
● 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.
This one also has a couple of known issues to be aware of:
SYMTPOM: 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 This primarily happens when managed devices are updated using outdated bundles or media through an update management tool such as Windows Server Update Services (WSUS) or Microsoft Endpoint Configuration Manager. This might also happen when using outdated physical media or ISO images that do not have the latest updates integrated.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.
WORKAROUND: 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 https://docs.microsoft.com/windows-ha...
We are working on a resolution and will provide updated bundles and refreshed media in the coming weeks.
SYMTPOM: When using the Microsoft Japanese Input Method Editor (IME) to enter Kanji characters in an app that automatically allows the input of Furigana characters, you might not get the correct Furigana characters. You might need to enter the Furigana characters manually.
Note: The affected apps are using the ImmGetCompositionString() function.
WORKAROUND: We are working on a resolution and will provide an update in an upcoming release.
As usual, these are mandatory updates. That means that if you don't go and install them through Windows Update now, they'll be installed automatically at some point.