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-of-bounds memory access that may result in information disclosure or a denial-of-service condition.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (8.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% 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-tuyaiot-out-of-bounds-memory-read… (Third Party Advisory, 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 2026-03-16.
- How severe is CVE-2026-28521?
- High severity. CVSS v3 base score is 7.7 out of 10.