CVE-2026-28519
Heap-Based Buffer Overflow in arduino-TuyaOpen DnsServer Enables Code Execution
Publication date: 2026-03-16
Last updated on: 2026-03-17
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tuya | arduino-tuyaopen | to 1.2.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-122 | A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.