It's the researchers itself call it a backdoor. Here's the announce on their website, in English https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-de

It's the researchers itself call it a backdoor. Here's the announce on their website, in English https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/ https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-...