CVE-2025-65855

Published Dec 17, 2025 CVSS 3.1 · 6.6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Netun
Netun helpflash Iot
Netun helpflash Iot Firmware
CPEs cpe:2.3:h:netun:helpflash_iot:-:*:*:*:*:*:*:*
cpe:2.3:o:netun:helpflash_iot_firmware:18_178_221102_ascii_pro_1r5_50:*:*:*:*:*:*:*
Vendors & Products Netun
Netun helpflash Iot
Netun helpflash Iot Firmware
Type Values Removed Values Added
First Time appeared Netun Solutions
Netun Solutions helpflash Iot
Vendors & Products Netun Solutions
Netun Solutions helpflash Iot
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-319
CWE-494
CWE-798
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Dec 17, 2025, 4:52 PM
Reserved
Nov 18, 2025, 12:00 AM
Status
Analyzed
Published
Dec 17, 2025, 5:15 PM
Modified
Oct 13, 2026, 11:10 AM