ECOVACS vacuum robot base stations do not validate firmware updates, so malicious over-the-air updates can be sent to base station via insecure connection between robot and base station.
ECOVACS robot vacuums and base stations communicate via an insecure Wi-Fi network with a deterministic AES encryption key, which can be easily derived.
ECOVACS lawnmowers and vacuums do not properly validate TLS certificates. An unauthenticated attacker can read or modify TLS traffic, possibly modifying firmware updates.