9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
9 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
0.967 High
EPSS
Percentile
99.7%
EXPIRATION NOTICE****IMPORTANT As of 9/12/2023, this KB is only available from Windows Update. It is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest security quality update.
11/9/21
IMPORTANT Because of minimal operations during the holidays and the upcoming Western new year, there won’t be a preview release (known as a “C” release) for the month of December 2021. There will be a monthly security release (known as a “B” release) for December 2021. Normal monthly servicing for both B and C releases will resume in January 2022.
UPDATED 12/14/21 REMINDER Windows 10, version 2004 has reached end of servicing as of this release on December 14, 2021. To continue receiving security and quality updates, Microsoft recommends that you update to the latest version of Windows 10.To update to one of the newer versions of Windows 10, we recommend that you use the appropriate Enablement Package KB (EKB). Using the EKB makes updating faster and easier and requires a single restart. To find the EKB for a specific OS, go to theImprovements and fixes section and click or tap the OS name to expand the collapsible section.
11/17/20For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 10, version 2004, see its update history page.**Note **Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.
NoteTo view the list of addressed issues, click or tap the OS name to expand the collapsible section.
__
Windows 10, version 21H2
**Important:**Use EKB KB5003791 to update to Windows 10, version 21H2.
This security update includes quality improvements. Key changes include:
__
Windows 10, version 21H1
**Important:**Use EKB KB5000736 to update to Windows 10, version 21H1.
This security update includes quality improvements. Key changes include:
__
Windows 10, version 20H2
**Important:**Use EKB KB4562830 to update to Windows 10, version 20H2.
This security update includes quality improvements. Key changes include:
__
Windows 10, version 2004
**Note:**This release also contains updates for Microsoft HoloLens (OS Build 19041.1173) released December 14, 2021. Microsoft will release an update directly to the Windows Update Client to improve Windows Update reliability on Microsoft HoloLens that have not updated to this most recent OS Build.
This security update includes quality improvements. Key changes include:
__
Click or tap to view the 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.NoteDevices 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 SSU: |
Before installing this updateMicrosoft now combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.Prerequisite:For Windows Server Update Services (WSUS) deployment or when installing the standalone package from Microsoft Update Catalog:If your devices do not have the May 11, 2021 update (KB5003173) or later LCU, you**must **install the special standalone August 10, 2021 SSU (KB5005260).Install this update****Release Channel | Available | Next Step |
---|---|---|
Windows Update and Microsoft Update | Yes | None. This update will be downloaded and installed automatically from Windows Update. |
Windows Update for Business | No | No longer available. |
Microsoft Update Catalog | No | No longer available. |
Windows Server Update Services (WSUS) | No | No longer available. |
If you want to remove the LCUTo remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command:DISM /online /get-packages.Running Windows Update Standalone Installer (wusa.exe) with the**/uninstall **switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.
File informationFor a list of the files that are provided in this update, download the file information for cumulative update 5008212. For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 19041.1371, 19042.1371, 19043.1371, and 19044.1371.
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
9 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
0.967 High
EPSS
Percentile
99.7%