How severe is CVE-2025-55081?

CVE-2025-55081 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2025-55081 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55081?

CVE-2025-55081 affects Eclipse Threadx Netx Duo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55081?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-55081 have an EU (EUVD) identifier?

Yes. CVE-2025-55081 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34608.

When was CVE-2025-55081 published?

CVE-2025-55081 was published on 2025-10-15 and last updated on 2026-06-17.

CVE-2025-55081

CVE-2025-55081 is a critical-severity vulnerability in Eclipse Threadx Netx Duo with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 6.9
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34608
Weakness: CWE-125
Affected product: Eclipse Threadx Netx Duo
Published: 2025-10-15
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-55081?: CVE-2025-55081 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2025-55081 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55081?: CVE-2025-55081 affects Eclipse Threadx Netx Duo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55081?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-55081 have an EU (EUVD) identifier?: Yes. CVE-2025-55081 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34608.
When was CVE-2025-55081 published?: CVE-2025-55081 was published on 2025-10-15 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:eclipse:threadx_netx_duo:*:*:*:*:*:*:*:*

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