VulnerabilityPublished 17 Oct 2025

CVE-2025-55094: Eclipse Foundation NetX Duo · Out-of-bounds Read

Affects Eclipse Foundation NetX DuoSource CVE Database V5

Not known to be exploited · CVSS 6.9 Medium : upgrade to 6.4.4 when convenient.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.4.4

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade eclipse-threadx/netxduo to 6.4.4.

Affected software

Product	Affected	Fixed in
GitHubeclipse-threadx/netxduo`pkg:github/eclipse-threadx/netxduo`Other threats	Affected <6.4.4	Fixed in 6.4.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. 2. Implement network-level filtering to block or drop malformed ICMPv6 packets, especially those with suspicious options, using firewalls or intrusion prevention systems. 3. Conduct thorough asset inventories to identify all devices running ThreadX with NetX Duo and prioritize patching or mitigation accordingly. 4. Employ network segmentation to isolate vulnerable embedded systems from critical networks and limit exposure to potential attackers. 5. Monitor network traffic for anomalous ICMPv6 packets that could indicate exploitation attempts. 6. Collaborate with device manufacturers to obtain firmware updates and security advisories related to this vulnerability. 7. Integrate vulnerability scanning and penetration testing focused on embedded devices to detect exploitation attempts or vulnerable configurations. 8. Educate operational technology and security teams about the risks associated with ICMPv6 handling vulnerabilities in embedded systems.

Description

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.

Impact

For European organizations, the primary impact of CVE-2025-55094 lies in the potential exposure of sensitive memory contents and possible device instability or crashes in embedded systems using NetX Duo. This could affect sectors relying heavily on IoT and embedded devices, such as manufacturing, automotive, healthcare, and critical infrastructure. Confidentiality breaches could lead to leakage of proprietary or personal data, while denial of service could disrupt operational technology environments. Given the vulnerability can be exploited remotely without authentication, attackers could leverage it to gain reconnaissance information or cause intermittent failures in networked devices. The impact is particularly relevant for organizations deploying ThreadX-based devices in critical roles, where stability and data protection are paramount. Although the vulnerability does not directly affect integrity or availability, the indirect consequences of memory disclosure or crashes could undermine trust in device security and reliability. The medium severity rating suggests a moderate risk, but the widespread use of NetX Duo in embedded systems means the potential attack surface is significant. European organizations should assess their exposure based on device inventories and network architectures.

CWE-125Out-of-bounds Read (opens in a new tab)
Base weaknessCWE Top 25 (2025): #8
The product reads data past the end, or before the beginning, of the intended buffer.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design · Language Selection
Use a language that provides appropriate memory abstractions.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Overread Buffers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/eclipse-threadx/netxduo/security/advisories/GHSA-rf32-h832-hg8r (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Oct 2025, 05:47 UTC

WeaknessesCWE-125

Technical details

References

Community reviews

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