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CVE-2026-28521— arduino-TuyaOpen TuyaIoT Out-of-Bounds Memory Read Information Disclosure

Quick assessment

Affected
Tuya arduino-TuyaOpen
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

arduino-TuyaOpen是Tuya开源的一个基于Arduino的物联网开发框架。 arduino-TuyaOpen 1.2.1之前版本存在缓冲区错误漏洞，该漏洞源于TuyaIoT组件存在越界内存读取，可能导致信息泄露或拒绝服务。

CVSS 7.7 · High EPSS 0.19% · P8
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I. Basic Information for CVE-2026-28521

Vulnerability Information
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Vulnerability Title
arduino-TuyaOpen TuyaIoT Out-of-Bounds Memory Read Information Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
arduino-TuyaOpen 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
arduino-TuyaOpen是Tuya开源的一个基于Arduino的物联网开发框架。 arduino-TuyaOpen 1.2.1之前版本存在缓冲区错误漏洞，该漏洞源于TuyaIoT组件存在越界内存读取，可能导致信息泄露或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tuya arduino-TuyaOpen 0 ~ 1.2.1 -

II. Public POCs for CVE-2026-28521

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9626 chars
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III. Intelligence Information for CVE-2026-28521

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Vendor Advisories for CVE-2026-28521 (2)

Vendor Pages for CVE-2026-28521 (1)

Same Patch Batch · Tuya · 2026-03-15 · 4 CVEs total

CVE-2026-28519 8.8 HIGH arduino-TuyaOpen DnsServer Heap-Based Buffer Overflow Remote Code Execution
CVE-2026-28520 8.4 HIGH arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution
CVE-2026-28522 6.5 MEDIUM arduino-TuyaOpen WiFiUDP Null Pointer Dereference Denial of Service

IV. Related Vulnerabilities

Same product: arduino-TuyaOpen
Same vendor: Tuya
Same weakness: CWE-125

V. Comments for CVE-2026-28521

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