Maybe some of you already have this knowledge, but I think not all of you do. Vulnerabilities have been discovered in the Wifi module of ESP8266 and ESP32 devices. The vulnerabilities are reported as CVE-2019-12586, CVE-2019-12587, CVE-2019-12588.
They affect authentication in Enterprise class networks (EAP-PEAP, EAP-TTLS or EAP-TLS), so rather few at home use
More vulnerabilities will probably come out over time.... and how to develop secure applications....
More info available on Github, among others.
https://matheus-garbelini.github.io/home/post/zero-pmk-installation/
https://github.com/Matheus-Garbelini/esp32_esp8266_attacks
They affect authentication in Enterprise class networks (EAP-PEAP, EAP-TTLS or EAP-TLS), so rather few at home use

More vulnerabilities will probably come out over time.... and how to develop secure applications....
More info available on Github, among others.
https://matheus-garbelini.github.io/home/post/zero-pmk-installation/
https://github.com/Matheus-Garbelini/esp32_esp8266_attacks