CVE-2026-28519: arduino-TuyaOpen before version 1.2.1 contains a heap-based buffer overflow vulnerability in the DnsServer com

Q: How do I fix CVE-2026-28519?

arduino-tuyaopen: upgrade to 1.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-28519 being exploited?

CVE-2026-28519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28519 affect?

CVE-2026-28519 affects arduino-tuyaopen. Severity is high (CVSS 8.8). 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 th

This month

HIGH 8.8UPGRADE

CVE-2026-28519 is a high-severity flaw (CVSS 8.8) affecting arduino-tuyaopen. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-03-16
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: tuya

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-16 14:19 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

tuya arduino-tuyaopen UPGRADE

Affected: < 1.2.1

Fixed in: 1.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy arduino-tuyaopen || rpm -q arduino-tuyaopen || arduino-tuyaopen --version

2. UPGRADE to 1.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arduino-tuyaopen

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arduino-tuyaopen

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28519?

arduino-tuyaopen: upgrade to 1.2.1. Exact commands for each OS are on this page.

Is CVE-2026-28519 being exploited?

CVE-2026-28519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28519 affect?

CVE-2026-28519 affects arduino-tuyaopen. Severity is high (CVSS 8.8). 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 th

How urgent is CVE-2026-28519?

Priority 40/100. High severity

Related CVEs

CVE-2026-28522 MEDIUM 6.5 UPGRADE arduino-TuyaOpen before version 1.2.1 contains a null pointer dereference vulnerability in the WiFiUDP compone
CVE-2026-28521 HIGH 7.7 UPGRADE arduino-TuyaOpen before version 1.2.1 contains an out-of-bounds memory read vulnerability in the TuyaIoT compo
CVE-2026-28520 HIGH 8.4 UPGRADE arduino-TuyaOpen before version 1.2.1 contains a single-byte buffer overflow vulnerability in the WiFiMulti co

References

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