What’s Vulnerable › Vulnerabilities

CVE-2025-65855

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-17 · updated 2026-10-13
• Weakness: CWE-319

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.

Affected products

• Netun Helpflash Iot Firmware: 18_178_221102_ascii_pro_1r5_50

References

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

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