CVE-2026-28520: Tuya Arduino-Tuyaopen

High severity, CVSS 8.4. EPSS: 0.2% chance of exploitation in the next 30 days.

arduino-TuyaOpen before version 1.2.1 contains a single-byte buffer overflow vulnerability in the WiFiMulti component. When the victim's smart hardware connects to an attacker-controlled AP hotspot, the attacker can exploit the overflow to execute arbitrary code on the affected embedded device.

Affected products

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

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