PT-2025-51840 · Netun Solutions · Helpflash Iot

Luis Miranda Acebedo · Published 2025-12-17 · Updated 2026-01-06 · CVE-2025-65855

Positive Technologies (AI Summary)

CVSS v3.1

6.6

Medium

Base vector

AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Netun Solutions HelpFlash IoT version v18 178 221102 ASCII PRO 1R5 50

Description The over-the-air (OTA) firmware update process in the software does not properly authenticate update servers or validate firmware signatures, and relies on hard-coded WiFi credentials that are consistent across all devices. An attacker with temporary physical access can initiate the OTA update mode by pressing a button for eight seconds. This allows the attacker to establish a malicious WiFi access point using the known credentials and deliver harmful firmware through unauthenticated HTTP, potentially leading to arbitrary code execution on the device. The device is a safety-critical emergency signaling device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Using Hardcoded Credentials

Cleartext Transmission of Sensitive Information

Weakness Enumeration

CWE-494

CWE-798

CWE-319

Related Identifiers

CVE-2025-65855

Affected Products

Helpflash Iot

References · 7

• https://osv.dev/vulnerability/CVE-2025-65855 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-65855 · Security Note
• https://docs.espressif.com/projects/esp-idf/en/v4.3.2 · Note
• https://luismirandaacebedo.github.io/CVE-2025-65855 · Note
• https://t.me/cveNotify/147838 · Telegram Post
• https://twitter.com/CVEnew/status/2001350847058579927 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2001362736261865474 · Twitter Post