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 3.x
| Source | Score | Severity | Vector | Exploitability | Impact |
|---|---|---|---|---|---|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | 6.6 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | 0.7 | 5.9 |
Products Affected
| Vendor | Product | Version |
|---|---|---|
| netun | helpflash_iot_firmware | 18_178_221102_ascii_pro_1r5_50 |