CVE-2025-65855

Description

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 v3.1 Score

6.6

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-319 CWE-319

CWE-494 CWE-494

CWE-798 CWE-798

Affected Products

Vendor	Product	Versions
netun	helpflash_iot_firmware	All
netun	helpflash_iot	All

References

Other References

https://docs.espressif.com/projects/esp-idf/en/v4.3.2/ https://luismirandaacebedo.github.io/CVE-2025-65855/

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 6.6 (MEDIUM).

How severe is CVE-2025-65855? +

CVE-2025-65855 has a CVSS v3.1 score of 6.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-65855? +

CVE-2025-65855 affects products from netun, specifically: helpflash_iot, helpflash_iot_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-65855? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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