CVE-2025-65855

State: Published
Severity: 6.6 Medium
Published: Dec 17, 2025
Updated: Dec 17, 2025
Reserved: Nov 18, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	6.6 Medium	CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-798 Use of Hard-coded Credentials
CWE-494 Download of Code Without Integrity Check
CWE-319 Cleartext Transmission of Sensitive Information

Affected Products

Product	Versions
n/an/a	n/aAffected

References

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