What is CVE-2026-28520?

CVE-2026-28520 is a high-severity vulnerability in Tuya Arduino-tuyaopen, classified under Off-by-one Error. CVSS score: 8.4/10. Published 2026-03-15.

How severe is CVE-2026-28520?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Tuya Arduino-tuyaopen

CVE-2026-28520

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…

EPSS: 0.000 (0.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tuya Arduino-tuyaopen — versions 0

Weakness classification (CWE)

CWE-193 — Off-by-one Error

References

Tuya SRC Security Advisory (vendor-advisory)
arduino-TuyaOpen GitHub Repository (product)
VulnCheck Advisory: arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution (third-party-advisory)

Frequently asked questions

What is CVE-2026-28520?: CVE-2026-28520 is a high-severity vulnerability in Tuya Arduino-tuyaopen, classified under Off-by-one Error. CVSS score: 8.4/10. Published 2026-03-15.
How severe is CVE-2026-28520?: High severity. CVSS v3 base score is 8.4 out of 10.