ECOVACS robot lawnmowers and vacuums use a deterministic symmetric key to decrypt firmware updates. An attacker can create and encrypt malicious firmware that will be successfully decrypted and installed by the robot.
Exploitability
AV:NAC:LAT:PPR:NUI:PVulnerable System
VC:HVI:HVA:HSubsequent System
SC:NSI:NSA:N7.7/CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCryptography