---
id: CVE-2025-55081
title: >-
  In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the
  _nx_secure_tls_process_clienthello() function was missing length verification
  of 

  certain SSL/TLS client hello message: the ciphersuite length and 

  compression method…
summary: >-
  In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the
  _nx_secure_tls_process_clienthello() function was missing length verification
  of 

  certain SSL/TLS client hello message: the ciphersuite length and 

  compression method…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-126
  - CWE-125
vendor: eclipse
product: threadx_netx_duo
affected:
  - threadx_netx_duo < 6.4.4.202503
patched:
  - threadx_netx_duo 6.4.4.202503
published: '2025-10-15'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T12:10:00.217'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-55081'
references:
  - url: >-
      https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-5vrv-8j5h-h6h6
    label: emo@eclipse.org
tags:
  - nvd
epss: 0.00369
epssPercentile: 0.28764
ingestedAt: '2026-10-08T11:31:27.428Z'
---

## Overview

In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the _nx_secure_tls_process_clienthello() function was missing length verification of 
certain SSL/TLS client hello message: the ciphersuite length and 
compression method length. In case of an attacker-crafted message with 
values outside of the expected range, it could cause an out-of-bound 
read.

## Affected

- `threadx_netx_duo < 6.4.4.202503`

## Remediation

Upgrade past the affected range:

- `threadx_netx_duo 6.4.4.202503`