How severe is CVE-2025-55086?

CVE-2025-55086 has a CVSS 3.x base score of 9.8, 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 high, and availability high.

Is CVE-2025-55086 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55086?

CVE-2025-55086 affects Eclipse Threadx Netx Duo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55086?

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-2025-55086 have an EU (EUVD) identifier?

Yes. CVE-2025-55086 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35094.

When was CVE-2025-55086 published?

CVE-2025-55086 was published on 2025-10-20 and last updated on 2026-06-17.

CVE-2025-55086

CVE-2025-55086 is a critical-severity vulnerability in Eclipse Threadx Netx Duo with a CVSS 3.x base score of 9.8. 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 9.8)
CVSS v4: 6.3
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35094
Weakness: CWE-125
Affected product: Eclipse Threadx Netx Duo
Published: 2025-10-20
Last modified: 2026-06-17

Description

In NetXDuo version before 6.4.4, a networking support module for Eclipse Foundation ThreadX, in the DHCPV6 client there was an unchecked index extracting the server DUID from the server reply. With a crafted packet, an attacker could cause an out of memory read.

Frequently asked questions

What is CVE-2025-55086?: In NetXDuo version before 6.4.4, a networking support module for Eclipse Foundation ThreadX, in the DHCPV6 client there was an unchecked index extracting the server DUID from the server reply. With a crafted packet, an attacker could cause an out of memory read.
How severe is CVE-2025-55086?: CVE-2025-55086 has a CVSS 3.x base score of 9.8, 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 high, and availability high.
Is CVE-2025-55086 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55086?: CVE-2025-55086 affects Eclipse Threadx Netx Duo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55086?: 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-2025-55086 have an EU (EUVD) identifier?: Yes. CVE-2025-55086 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35094.
When was CVE-2025-55086 published?: CVE-2025-55086 was published on 2025-10-20 and last updated on 2026-06-17.

References

https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-99pw-cp79-2j5j

Affected products (1)

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

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