How severe is CVE-2026-28520?

CVE-2026-28520 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28520?

CVE-2026-28520 affects Tuya Arduino-tuyaopen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28520 have an EU (EUVD) identifier?

Yes. CVE-2026-28520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12227.

When was CVE-2026-28520 published?

CVE-2026-28520 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-28520

CVE-2026-28520 is a high-severity vulnerability in Tuya Arduino-tuyaopen with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-193.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v4: 8.6
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12227
Weakness: CWE-193
Affected product: Tuya Arduino-tuyaopen
Published: 2026-03-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-28520?: 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.
How severe is CVE-2026-28520?: CVE-2026-28520 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28520?: CVE-2026-28520 affects Tuya Arduino-tuyaopen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28520 have an EU (EUVD) identifier?: Yes. CVE-2026-28520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12227.
When was CVE-2026-28520 published?: CVE-2026-28520 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tuya:arduino-tuyaopen:*:*:*:*:*:*:*:*

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