Buffer overflow in Tuya Arduino-Tuyaopen
CVE-2026-28519
arduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the DnsServer component. An attacker on the same local area network who controls the LAN DNS server can send malicious DNS responses to overflow the heap buffer, potentially allowing execution of arbitrary code on affected embedded devices.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · 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-dnsserver-heap-based-buffer-overf… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-28519?
- CVE-2026-28519 is a high-severity vulnerability in Tuya Arduino-Tuyaopen, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-16.
- How severe is CVE-2026-28519?
- High severity. CVSS v3 base score is 8.8 out of 10.