Description

HMS Networks Ewon Flexy with firmware before 15.0s4, Cosy+ with firmware 22.xx before 22.1s6, and Cosy+ with firmware 23.xx before 23.0s3 have weak entropy for authentication cookies, allowing an attacker with a stolen session cookie to find the user password by brute-forcing an encryption parameter.

INFO

Published Date :

2026-03-12T00:00:00.000Z

Last Modified :

2026-03-13T12:58:56.027Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2026-25818 vulnerability.

Vendors Products
Hms-networks
  • Ewon Cosy
  • Ewon Flexy
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-25818.

URL Resource
https://hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurity/security-advisory/hms-security-advisory-2026-03-09-001---ewon-several-flexy-and-cosy--vulnerabilities.pdf?sfvrsn=f7c027b8_13 cve-icon cve-icon
https://www.hms-networks.com/p/flexy20500-00ma-ewon-flexy-205 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact