For those who program with electronics on IoT (internet of things) devices, the ESP32 has 29 undocumented commands that could be used as a ‘backdoor’.
Below is the article that provides more details.
1 Like
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.
https://x.com/pascal_gujer/status/1898442439704158276
Z80 had several undocumented ones, 6502 had one nicknamed “Ignore next instruction”, X86 has some, and I bet Apple M series has some too.
There is no backdoor found, just undocumented api calls (functions) which is very normal. The posting is misleading, and causing mayhem for nothing.
1 Like