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CVE-2026-28519

HIGH CVSS 4.0: 8.7 EPSS 0.01%
Updated Mar 17, 2026
Tuya
Parameter Value
CVSS 8.7 (HIGH)
Affected Versions before 1.2.1
Fixed In 1.2.1
Type CWE-122 (Heap-based Buffer Overflow)
Vendor Tuya
Public PoC No

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.

Attack Parameters

Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Tuya Arduino-Tuyaopen
cpe:2.3:a:tuya:arduino-tuyaopen:*:*:*:*:*:*:*:*
1.2.1