Undocumented
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Undocumented commands found in Bluetooth chip used by a billion devices
Update 3/9/25: After receiving concerns about the use of the term ‘backdoor’ to refer to these undocumented commands, we have updated our title and story. Our original story can be found here. The ubiquitous ESP32 microchip made by Chinese manufacturer Espressif and used by over 1 billion units as of 2023 contains undocumented commands that could be leveraged for attacks. The…
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Blog
Undocumented “backdoor” found in Bluetooth chip used by a billion devices
The ubiquitous ESP32 microchip made by Chinese manufacturer Espressif and used by over 1 billion units as of 2023 contains an undocumented “backdoor” that could be leveraged for attacks. The undocumented commands allow spoofing of trusted devices, unauthorized data access, pivoting to other devices on the network, and potentially establishing long-term persistence. This was discovered by Spanish researchers Miguel Tarascó…
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