How severe is CVE-2026-28519?

CVE-2026-28519 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28519?

CVE-2026-28519 affects Tuya Arduino-tuyaopen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28519?

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-2026-28519 have an EU (EUVD) identifier?

Yes. CVE-2026-28519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12226.

When was CVE-2026-28519 published?

CVE-2026-28519 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-28519

CVE-2026-28519 is a high-severity vulnerability in Tuya Arduino-tuyaopen with a CVSS 3.x base score of 8.8. 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-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12226
Weakness: CWE-122
Affected product: Tuya Arduino-tuyaopen
Published: 2026-03-16
Last modified: 2026-06-17

Description

arduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the DnsServer component. An attacker on the same local area network who controls the LAN DNS server can send malicious DNS responses to overflow the heap buffer, potentially allowing execution of arbitrary code on affected embedded devices.

Frequently asked questions

What is CVE-2026-28519?: arduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the DnsServer component. An attacker on the same local area network who controls the LAN DNS server can send malicious DNS responses to overflow the heap buffer, potentially allowing execution of arbitrary code on affected embedded devices.
How severe is CVE-2026-28519?: CVE-2026-28519 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28519?: CVE-2026-28519 affects Tuya Arduino-tuyaopen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28519?: 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-2026-28519 have an EU (EUVD) identifier?: Yes. CVE-2026-28519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12226.
When was CVE-2026-28519 published?: CVE-2026-28519 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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