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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.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-15 | Updated 2026-03-16 | Assigner VulnCheck




HIGH: 8.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Off-by-one Error

Product status

Any version before 1.2.1
affected

Credits

Maxime ROSSI BELLOM finder

References

src.tuya.com/announcement/32 (Tuya SRC Security Advisory) vendor-advisory

github.com/tuya/arduino-TuyaOpen (arduino-TuyaOpen GitHub Repository) product

www.vulncheck.com/...e-buffer-overflow-remote-code-execution (VulnCheck Advisory: arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution) third-party-advisory

cve.org (CVE-2026-28520)

nvd.nist.gov (CVE-2026-28520)

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