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Vulnerability record · CVE-2026-28520 · published 16 March 2026

CVE-2026-28520: Arduino-tuyaopen vulnerability

Tuya · Arduino Tuyaopen

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.

8.6 CVSS 4.0 High EPSS 0.22% · top 88.4% CWE-193 · CWE-193
8.6CVSS 4.0 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/tuya/arduino-TuyaOpen Product
https://src.tuya.com/announcement/32 Vendor Advisory
https://www.vulncheck.com/advisories/arduino-tuyaopen-wifimulti-single-byte-buffer-overflow-remote-code-execution Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-28519Arduino-tuyaopen heap-based buffer overflow vulnerabilityarduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the DnsServer component. An attacker on the same local a…EPSS 0.43%7.1CVE-2026-28522Arduino-tuyaopen null pointer dereference vulnerabilityarduino-TuyaOpen before version 1.2.1 contains a null pointer dereference vulnerability in the WiFiUDP component. An attacker on the same local area …EPSS 0.34%7.0CVE-2026-28521Arduino-tuyaopen out-of-bounds read vulnerabilityarduino-TuyaOpen before version 1.2.1 contains an out-of-bounds memory read vulnerability in the TuyaIoT component. An attacker who hijacks or contro…EPSS 0.19%7.8CVE-2021-3156Sudo off-by-one heap overflow allows root privilege escalationSudo before 1.9.5p2 contains an off-by-one error leading to a heap-based buffer overflow. Triggering it via 'sudoedit -s' with a command-line argumen…KEVEPSS 100%analysed

Source: NIST National Vulnerability Database (record CVE-2026-28520), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.