What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-16 · updated 2026-06-17
• Weakness: CWE-125

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.

Affected products

• Tuya arduino-TuyaOpen: before 1.2.1 — fixed in 1.2.1

How to fix

Upgrade to a fixed version: Tuya arduino-TuyaOpen 1.2.1. Check the vendor advisory for mitigations.

References

• https://github.com/tuya/arduino-TuyaOpen
• https://src.tuya.com/announcement/32
• https://www.vulncheck.com/advisories/arduino-tuyaopen-tuyaiot-out-of-bounds-memory-read-information-disclosure

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