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TI-2026-22781 Aliases CVE-2026-28519GHSA-8gpj-j2h5-7993

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

Priority MEDIUM 40CWE-122Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Fix Fixed arduino-TuyaOpen (Tuya): 1.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Tuyaarduino-TuyaOpenbefore 1.2.11.2.1Patch availableCNA
  • arduino-TuyaOpen VendorTuya Affected before 1.2.1 Fixed in 1.2.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tuya:arduino-tuyaopen:*:*:*:*:*:*:*:*before 1.2.1VulnerableTuya
  • cpe:2.3:a:tuya:arduino-tuyaopen:*:*:*:*:*:*:*:* Versions before 1.2.1 Vulnerable ·Tuya

Remediation

  • Fix · CNA arduino-TuyaOpen (Tuya) Fixed in 1.2.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Tuya arduino-TuyaOpen — Tuya SRC Security Advisory

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-22782 arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code ExecutionPriority LOW 39
    • TI-2026-22784 arduino-TuyaOpen WiFiUDP Null Pointer Dereference Denial of ServicePriority LOW 31
    • TI-2026-22783 arduino-TuyaOpen TuyaIoT Out-of-Bounds Memory Read Information DisclosurePriority LOW 30
    Show all 4 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28519
  2. 2026-10-03 Alias added: GHSA-8gpj-j2h5-7993

References

Advisory 1

Other 1

  • TI-2026-22782 arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution CVSS 4.0HIGH 8.6
  • TI-2026-22784 arduino-TuyaOpen WiFiUDP Null Pointer Dereference Denial of Service CVSS 4.0HIGH 7.1
  • TI-2026-22783 arduino-TuyaOpen TuyaIoT Out-of-Bounds Memory Read Information Disclosure CVSS 4.0HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences