CVE Catalog

CVE-2025-65855

MediumCVSS 6.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.10%

1th percentile - higher than 1% of all known CVEs

Summary

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.

Risk Assessment

Someone with brief physical access can take over the emergency device and execute arbitrary code on it, potentially causing failure or false operation in a life-threatening situation.

Recommendation

Introduce unique per-device WiFi credentials, update server authentication, and firmware signature validation; until a fix is available, restrict physical access to the devices.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS