Mitigation Strategies

To mitigate this vulnerability, you should update the arduino-TuyaOpen software to version 1.2.1 or later, where the heap-based buffer overflow issue in the DnsServer component has been fixed.

Additionally, since the vulnerability requires an attacker to be on the same local area network controlling the LAN DNS server, you should ensure your LAN DNS servers are secure and trusted to prevent malicious DNS responses.

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Executive Summary

CVE-2026-28519 is a high-severity heap-based buffer overflow vulnerability found in the DnsServer component of arduino-TuyaOpen versions prior to 1.2.1.

An attacker on the same local area network (LAN) who controls the LAN DNS server can send malicious DNS responses that overflow the heap buffer.

This overflow can potentially allow the attacker to execute arbitrary code on affected embedded devices.

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Impact Analysis

This vulnerability can lead to remote code execution on affected embedded devices running arduino-TuyaOpen versions prior to 1.2.1.

An attacker with access to the same LAN and control over the LAN DNS server can exploit this flaw without requiring privileges or user interaction.

Successful exploitation can compromise the confidentiality, integrity, and availability of the device, potentially allowing the attacker to take full control.

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Compliance Impact

I don't know

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Detection Guidance

I don't know

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