What is CVE-2025-55084?

CVE-2025-55084 is a medium-severity vulnerability in Eclipse Threadx Netx Duo, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2025-10-16.

How severe is CVE-2025-55084?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Eclipse Threadx Netx Duo

CVE-2025-55084

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.

Published 2025-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Eclipse Threadx Netx Duo
Eclipse Foundation Netx Duo — versions 0

Weakness classification (CWE)

CWE-126 — Buffer Over-read

References

github.com/eclipse-threadx/netxduo/security/advisories/GHSA-m474-39rw-v8gm (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-55084?: CVE-2025-55084 is a medium-severity vulnerability in Eclipse Threadx Netx Duo, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2025-10-16.
How severe is CVE-2025-55084?: Medium severity. CVSS v3 base score is 5.3 out of 10.