What is CVE-2026-28521?

CVE-2026-28521 is a high-severity vulnerability in Tuya Arduino-tuyaopen, classified under Out-of-bounds Read. CVSS score: 7.7/10. Published 2026-03-15.

How severe is CVE-2026-28521?

High severity. CVSS v3 base score is 7.7 out of 10.

Out-of-bounds Read in Tuya Arduino-tuyaopen

CVE-2026-28521

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…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (0.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Tuya Arduino-tuyaopen — versions 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

Tuya SRC Security Advisory (vendor-advisory)
arduino-TuyaOpen GitHub Repository (product)
VulnCheck Advisory: arduino-TuyaOpen TuyaIoT Out-of-Bounds Memory Read Information Disclosure (third-party-advisory)

Frequently asked questions

What is CVE-2026-28521?: CVE-2026-28521 is a high-severity vulnerability in Tuya Arduino-tuyaopen, classified under Out-of-bounds Read. CVSS score: 7.7/10. Published 2026-03-15.
How severe is CVE-2026-28521?: High severity. CVSS v3 base score is 7.7 out of 10.