Yeelight Smart AI Speaker 3.3.10_0074 devices have improper access control over the UART interface, allowing physical attackers to obtain a root shell. The attacker can then exfiltrate the audio data, read cleartext Wi-Fi credentials in a log file, or access other sensitive device and user information.

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-20007
• https://forum.yeelight.com
• https://payatu.com/yeelight-smart-ai-speaker-responsible-disclosure