PatchSiren cyber security CVE debrief

CVE-2025-0432 HMS Networks CVE debrief

A medium-severity vulnerability in HMS Networks Ewon Flexy 202 allows user credentials to be transmitted in cleartext when adding users or changing credentials via the device's web interface. The issue, published January 23, 2025, exposes authentication data to network eavesdropping in adjacent network scenarios.

Vendor: HMS Networks
Product: Ewon Flexy 202
CVSS: MEDIUM 5.7
CISA KEV: Not listed in stored evidence
Original CVE published: 2025-01-23
Original CVE updated: 2025-01-23
Advisory published: 2025-01-23
Advisory updated: 2025-01-23

Who should care

Organizations operating HMS Networks Ewon Flexy 202 industrial remote access gateways in manufacturing, energy, water treatment, and other industrial sectors. Security teams responsible for OT/ICS network security, network administrators managing remote access infrastructure, and compliance officers addressing NIST CSF or IEC 62443 requirements should prioritize assessment.

Technical summary

The Ewon Flexy 202 industrial gateway transmits user credentials without encryption when administrators add new users or modify existing credentials through the device's web-based management interface. This cleartext transmission occurs over HTTP or unencrypted channels, allowing attackers with adjacent network access to capture authentication credentials through passive network monitoring. The vulnerability affects all versions of the Ewon Flexy 202 product. The CVSS 3.1 score of 5.7 reflects the adjacent network attack vector, low attack complexity, and high confidentiality impact with no integrity or availability effects. Successful exploitation could lead to unauthorized administrative access to affected devices and connected industrial control systems.

Defensive priority

medium

Recommended defensive actions

Integrate Ewon Flexy 202 with Talk2M cloud service to ensure encrypted remote access connections
Follow HMS Networks documented security best practices for Ewon solution deployment
Disable unused protocols and services on LAN, WAN, and VPN interfaces per vendor guidance
Review and implement network segmentation to limit exposure of device management interfaces
Monitor for unauthorized access attempts to device web management interfaces

Evidence notes

CISA CSAF advisory ICSA-25-023-06 confirms cleartext credential transmission during user management operations via the Ewon Flexy 202 web interface. CVSS 3.1 vector AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N indicates adjacent network attack vector with high confidentiality impact. Vendor HMS Networks provides mitigation guidance through documented security best practices.

Official resources

public