CVE-2026-28519

HIGH

arduino-TuyaOpen DnsServer Heap-Based Buffer Overflow Remote Code Execution

Title source: cna

Description

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.

References (3)

[Vendor Advisory] https://src.tuya.com/announcement/32

[Product] https://github.com/tuya/arduino-TuyaOpen

[Third Party Advisory] https://www.vulncheck.com/advisories/arduino-tuyaopen-dnsserver-heap-based-buffer-overflow-remote-code-execution

Scores

CVSS v3 8.8

EPSS 0.0001

EPSS Percentile 0.8%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-122

Status published

Products (2)

Tuya/arduino-TuyaOpen < 1.2.1

tuya/arduino-tuyaopen < 1.2.1

Published Mar 16, 2026

Tracked Since Mar 16, 2026