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 execute arbitrary code on the affected embedded device.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (11.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Tuya Arduino-Tuyaopen — versions 0
Weakness classification (CWE)
References
- src.tuya.com/announcement/32 (vendor-advisory, Vendor Advisory)
- github.com/tuya/arduino-TuyaOpen (Product, product)
- www.vulncheck.com/advisories/arduino-tuyaopen-wifimulti-single-byte-buffer-over… (Third Party Advisory, 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 2026-03-16.
- How severe is CVE-2026-28520?
- High severity. CVSS v3 base score is 8.4 out of 10.