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The ESP32 "backdoor" that wasn't | Dark Mentor LLC
(darkmentor.com)
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this post was submitted on 09 Mar 2025
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I tried to offer a gentler backgrounder on this HCI business: https://lemmy.ml/comment/17160273
The opcodes that actually jumped out at me more than the undocumented ones were the ones that erases the flash.
But the conclusion stands. None of this is a 'backdoor' unless you can secretly access it from the wireless side and nothing in the presentation points to that. If I had to guess, the opcodes are for QA and tuning on the manufacturing line.