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Component Firmware Update
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Component Firmware Update

Component Firmware Update (CFU) is a mechanism developed by the Microsoft Devices team which allows Original Equipment Manufacturers (OEM’s) and Independent Hardware Vendors (IHV’s) a reliable, robust against power interruptions and authenticated mechanism for updating firmware for devices that have shipped to customers. This release contains a reference device driver for delivering the firmware payload to a target device, and reference firmware for receiving the firmware payload and associated documentation.

For an overview, read this post: Introducing Component Firmware Update and watch the WinHEC 2018 video on Component Firmware Update.


The Documentation folder contains the CFU protocol specification and the CFU Driver Design documenation.
The Host folder contains a link to the sample CFU protocol driver source code on GitHub.
The Firmware folder contains sample firmware source code for implementing the CFU protocol.
The Tools folder contains tools used with CFU.


This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact with any additional questions or comments.

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