CVE-2026-28519

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

8.7 High

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.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.39%Up 0.4 points since Mar 16, 2026

What each source reports

CVE List Score used 8.7

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

Record: CVE-2026-28519
CVSS 4.0: 8.7 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Updated: 2026-11-02

EUVDEUVD-2026-12226 8.7

Record: EUVD-2026-12226
CVSS 4.0: 8.7 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-8gpj-j2h5-7993 8.7

arduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the...

Record: GHSA-8gpj-j2h5-7993
CVSS 4.0: 8.7 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Updated: 2026-11-02

NVD 8.7

Record: CVE-2026-28519
CVSS 4.0: 8.7 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Updated: 2026-11-02

OSV 8.7

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

Record: CVE-2026-28519
CVSS 4.0: 8.7 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-122
Updated: 2026-11-02

Affected products

tuya arduino-tuyaopen

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-28519 is a high vulnerability (CVSS 8.7) in Tuya Arduino-tuyaopen, published March 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. No source names a fixed version.