---
id: CVE-2025-55084
title: >-
  In NetX Duo version before 6.4.4, the component of Eclipse Foundation ThreadX,
  there was an incorrect bound check
  in_nx_secure_tls_proc_clienthello_supported_versions_extension() in the
  extension version field.
summary: >-
  In NetX Duo version before 6.4.4, the component of Eclipse Foundation ThreadX,
  there was an incorrect bound check
  in_nx_secure_tls_proc_clienthello_supported_versions_extension() in the
  extension version field.
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-126
vendor: eclipse
product: threadx_netx_duo
affected:
  - threadx_netx_duo < 6.4.4.202503
patched:
  - threadx_netx_duo 6.4.4.202503
published: '2025-10-16'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-55084'
references:
  - url: >-
      https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-m474-39rw-v8gm
    label: emo@eclipse.org
tags:
  - nvd
epss: 0.00331
epssPercentile: 0.2411
ingestedAt: '2026-10-08T11:31:27.449Z'
---

## Overview

In NetX Duo version before 6.4.4, the component of Eclipse Foundation ThreadX, there was an incorrect bound check in_nx_secure_tls_proc_clienthello_supported_versions_extension() in the extension version field.

## Affected

- `threadx_netx_duo < 6.4.4.202503`

## Remediation

Upgrade past the affected range:

- `threadx_netx_duo 6.4.4.202503`