# CVE-2026-28520

## Summary

- **CVE ID:** CVE-2026-28520
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-193
- **Published:** Mar 15, 2026
- **Last Modified:** Mar 16, 2026

## Description

arduino-TuyaOpen before version 1.2.1 contains a single-byte buffer overflow vulnerability in the WiFiMulti component. When the victim's smart hardware connects to an attacker-controlled AP hotspot, the attacker can exploit the overflow to execute arbitrary code on the affected embedded device.

## Affected Products

- Tuya — arduino-TuyaOpen (0)

## References

- [CNA](https://src.tuya.com/announcement/32)
- [CNA](https://github.com/tuya/arduino-TuyaOpen)
- [CNA](https://www.vulncheck.com/advisories/arduino-tuyaopen-wifimulti-single-byte-buffer-overflow-remote-code-execution)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.19%
- **EPSS Percentile:** 9.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._