CVE-2025-65855

The OTA firmware update mechanism in Netun Solutions HelpFlash IoT (firmware v18_178_221102_ASCII_PRO_1R5_50) uses hard-coded WiFi credentials identical across all devices and does not authenticate update servers or validate firmware signatures. An attacker with brief physical access can activate OTA mode (8-second button press), create a malicious WiFi AP using the known credentials, and serve malicious firmware via unauthenticated HTTP to achieve arbitrary code execution on this safety-critical emergency signaling device.

CVSS v3 6.6 MEDIUM

6.6^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.7 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://docs.espressif.com/projects/esp-idf/en/v4.3.2/	Product
https://luismirandaacebedo.github.io/CVE-2025-65855/	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:netun:helpflash_iot_firmware:18_178_221102_ascii_pro_1r5_50:*:*:*:*:*:*:*

cpe:2.3:h:netun:helpflash_iot:-:*:*:*:*:*:*:*

History

13 Oct 2026, 11:10

Type	Values Removed	Values Added
Summary		(es) El mecanismo de actualización de firmware OTA en Netun Solutions HelpFlash IoT (firmware v18_178_221102_ASCII_PRO_1R5_50) utiliza credenciales WiFi codificadas de forma rígida idénticas en todos los dispositivos y no autentica los servidores de actualización ni valida las firmas del firmware. Un atacante con acceso físico breve puede activar el modo OTA (pulsación de botón de 8 segundos), crear un punto de acceso WiFi malicioso utilizando las credenciales conocidas y servir firmware malicioso a través de HTTP no autenticado para lograr la ejecución de código arbitrario en este dispositivo de señalización de emergencia crítico para la seguridad.

Information

Published : 2025-12-17 17:15

Updated : 2026-10-13 11:10

NVD link : CVE-2025-65855

Mitre link : CVE-2025-65855

CVE.ORG link : CVE-2025-65855

JSON object : View

Products Affected

netun

helpflash_iot_firmware
helpflash_iot

CWE

CWE-319

Cleartext Transmission of Sensitive Information

CWE-494

Download of Code Without Integrity Check

CWE-798

Use of Hard-coded Credentials

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