Meross MSG100 devices before 3.2.3 allow an attacker to replay the same data or similar data (e.g., an attacker who sniffs a Close message can transmit an acceptable Open message).
https://infosec.rm-it.de/?p=878&preview=1&_ppp=219bc85c2f
https://infosec.rm-it.de/2021/06/18/meross-smart-wi-fi-garage-door-opener-analysis/