CVE-2025-55081: threadx netx duo Out-of-bounds Read

Description

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.

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-126 CWE-126

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
eclipse	threadx_netx_duo	< 6.4.4.202503

References

Advisories & Patches

https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-5vrv-8j5h-h6h6

Frequently Asked Questions

What is CVE-2025-55081? +

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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-55081? +

CVE-2025-55081 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-55081? +

CVE-2025-55081 affects products from eclipse, specifically: threadx_netx_duo. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-55081? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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