CVE-2026-28520 json
arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution
published 2026-03-15 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-12227
- cvss
- 8.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Tuya arduino-TuyaOpen 1.2.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.6 | 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 |
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.6 | 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:X/V:X/RE:X/U:X |
Affected products
- Tuya arduino-TuyaOpen
Classification
- Weakness
-
- CWE-193 Off-by-one Error
References
-
src.tuya.com
/announcement/32
vendor-advisory
-
github.com
/tuya/arduino-TuyaOpen
product
-
vulncheck.com
/advisories/arduino-tuyaopen-wifimulti-single-byte-buffer-overflow-remote-code-execution
third-party-advisory
Sources
- CVE List CVE-2026-28520
- NVD CVE-2026-28520
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