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The official source for firmware images is the Mimosa support website. You can find a link to the firmware page in their product manuals, which is http://mimosa.co/firmware . From there, you should be able to browse or search for the correct firmware for your C5c device.

Click the download button to save the firmware image file (typically a .tar.gz or .bin format) to your local computer. Do not extract or modify the file contents. Step-by-Step Installation Guide

Before initiating the firmware download and installation, complete these precautionary steps to prevent data loss or device bricking:

Mimosa officially released firmware upgrades containing the necessary security mitigations in early 2021, with version 2.8.1 being one of the first builds to include these critical patches. Therefore, if your C5c is running any version prior to 2.8.1, your network has been exposed to a significant security risk. Furthermore, using older firmware versions like 2.5.4 or 2.3.0 means you are missing out on years of performance improvements and bug fixes.

Check the dashboard header to confirm that the firmware version now reads . Troubleshooting Post-Upgrade Issues