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TI-2026-22783 Aliases CVE-2026-28521GHSA-r4wm-392x-hfg5

arduino-TuyaOpen TuyaIoT Out-of-Bounds Memory Read Information Disclosure

Priority LOW 30CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

arduino-TuyaOpen before version 1.2.1 contains an out-of-bounds memory read vulnerability in the TuyaIoT component. An attacker who hijacks or controls the Tuya cloud service can issue malicious DP event data to victim devices, causing out-of-bounds memory access that may result in information disclosure or a denial-of-service condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00225 13th 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
Partial

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-2026-22781 arduino-TuyaOpen DnsServer Heap-Based Buffer Overflow Remote Code ExecutionPriority MEDIUM 40
    • 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
    Show all 4 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28521
  2. 2026-10-03 Alias added: GHSA-r4wm-392x-hfg5

References

Advisory 1

Other 1

  • TI-2026-22781 arduino-TuyaOpen DnsServer Heap-Based Buffer Overflow Remote Code Execution CVSS 4.0HIGH 8.7
  • 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

Sources

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