CVE-2026-28519: Tuya Arduino-Tuyaopen

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

arduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the DnsServer component. An attacker on the same local area network who controls the LAN DNS server can send malicious DNS responses to overflow the heap buffer, potentially allowing execution of arbitrary code on affected embedded devices.

Affected products

• Tuya Arduino-Tuyaopen: before 1.2.1 (fixed in 1.2.1)

Published 2026-03-16. Last modified 2026-06-17.