CVE-2025-29660: Yiiot Xy-3820 Firmware

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

A vulnerability exists in the daemon process of the Yi IOT XY-3820 v6.0.24.10, which exposes a TCP service on port 6789. This service lacks proper input validation, allowing attackers to execute arbitrary scripts present on the device by sending specially crafted TCP requests using directory traversal techniques.

Affected products

• Yiiot Xy-3820 Firmware: version 6.0.24.10 only

Published 2025-04-21. Last modified 2026-06-17.