VulnerabilityAnalyzed

CVE-2026-28521

arduino-TuyaOpen before version 1.2.1 contains an out-of-bounds memory read vulnerability in the TuyaIoT component.

HIGH 7.0EPSS 0.21%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 4.0: 7.0 HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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/M
EPSS: 0.21% probability · 12th percentile
CISA KEV: Not listed
Weakness: CWE-125
Affected: tuya/arduino-tuyaopen
Source: disclosure@vulncheck.com

References

https://github.com/tuya/arduino-TuyaOpenProduct
https://src.tuya.com/announcement/32Vendor Advisory
https://www.vulncheck.com/advisories/arduino-tuyaopen-tuyaiot-out-of-bounds-memory-read-information-disclosureThird Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.