CVE-2025-55094· NVD / CVE Program· CNA eclipse

Potential out-of-bounds read in _nx_icmpv6_validate_options()

In NetX Duo before 6.4.4, the networking support module for Eclipse Foundation ThreadX, there was a potential out of bound read issue in _nx_icmpv6_validate_options() when handling a packet with ICMP6 options.

MediumCVSS 6.9 · v4.0—No exploit Fix available

Published: Oct 17, 2025
Updated: Jun 17, 2026
EPSS: 0.4% · 33th percentile
CWE: CWE-125

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Report tools

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Action score

Monitor

Low priority for now.

CVSS: 27 / 40 · 6.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · eclipse: 6.9; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

Vendor	Product	CPE
eclipse	threadx netx duo	cpe:2.3:a:eclipse:threadx_netx_duo

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

eclipse threadx netx duobefore 6.4.4.202503

Versions reported by the vendor

Affected version ranges reported by the assigning authority (eclipse). Independent of NVD's CPE analysis and usually ahead of it.

Eclipse Foundation NetX Duo
- before 6.4.4affected · semver

Same product

eclipse: all records

Other highest-scoring records for the same primary product.

CVE-2024-2452Integer wraparound, under-allocation, and heap buffer overflow in Eclipse ThreadX NetX Duo __portable_aligned_alloc()
39Monitor
CVE-2025-55085Web http client: Unchecked Server-Side Malicious Packet Issue
35Monitor
CVE-2025-55102A denial-of-service vulnerability exists in the NetX IPv6 component functionality of Eclipse ThreadX NetX Duo.
34Monitor
CVE-2026-11576The security fix for CVE-2025-0728 in eclipse-threadx NetX Duo refactors error handling in the HTTP server PUT process to use a shared clean
30Monitor
CVE-2025-2260Eclipse ThreadX NetX Duo HTTP component server denial of service
28Monitor
CVE-2025-0726Eclipse ThreadX NetX Duo HTTP server denial of service
28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Eclipse Foundation NetX Duo	6.4.4	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Justin Staufferfinder
Ilja van Sprundelfinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2025-550850 days apartWeb http client: Unchecked Server-Side Malicious Packet Issue
35Monitor
CVE-2025-550920 days apartPotential out of bound read in _nx_ipv4_option_process()
27Monitor
CVE-2025-550901 days apartPotential out of bound read issue in _nx_ipv4_packet_receive() in NetX Duo
27Monitor
CVE-2025-550911 days apartPotential out of bound read in _nx_ip_packet_receive()
27Monitor
CVE-2025-550822 days apartPotential out of bound read and info leak in_nx_secure_tls_psk_identity_find()
27Monitor
CVE-2025-550870 days apartIn NextX Duo's snmp addon versions before 6.4.4, a part of the Eclipse Foundation ThreadX, an attacker could cause an out-of-bound read by a
25Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary