CVE-2026-28519

HIGH

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

Title source: cna
STIX 2.1

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)

Core 3
Core References
Vendor Advisory vendor-advisory
Tuya SRC Security Advisory
https://src.tuya.com/announcement/32
Product product
arduino-TuyaOpen GitHub Repository
https://github.com/tuya/arduino-TuyaOpen
Third Party Advisory third-party-advisory
VulnCheck Advisory: arduino-TuyaOpen DnsServer Heap-Based Buffer Overflow Remote Code Execution
https://www.vulncheck.com/advisories/arduino-tuyaopen-dnsserver-heap-based-buffer-overflow-remote-code-execution

Scores

CVSS v3 8.8
EPSS 0.0040
EPSS Percentile 31.2%
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