CVE-2025-55083VulnerabilityPublished 15 Oct 2025Updated 27 Oct 2025

CVE-2025-55083: Eclipse Foundation NetX Duo · Buffer Over-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 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

6.9Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% 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 15 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 2026-10-25.

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 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. Immediately identify all devices and systems running NetX Duo versions prior to 6.4.4 within the organization's environment, focusing on embedded and IoT devices. 2. Apply the official patch or upgrade to NetX Duo version 6.4.4 or later as soon as it becomes available from the Eclipse Foundation. 3. If patching is not immediately possible, implement network segmentation and firewall rules to restrict access to vulnerable devices, limiting exposure to untrusted networks. 4. Conduct memory and network traffic monitoring on affected devices to detect unusual data access patterns or potential exploitation attempts. 5. Review and harden device configurations to minimize unnecessary network services and interfaces exposed externally. 6. Engage with device vendors and suppliers to confirm patch availability and deployment timelines. 7. Incorporate this vulnerability into vulnerability management and incident response plans to ensure timely detection and remediation. 8. Perform security audits and penetration testing on embedded systems to identify similar memory handling issues proactively.

Description

In NetX Duo version before 6.4.4, the component of Eclipse Foundation ThreadX, there was an incorrect bound check resulting it out by two out of bound read.

Impact

For European organizations, the primary impact of CVE-2025-55083 is the potential unauthorized disclosure of sensitive information due to out-of-bounds memory reads in devices running vulnerable versions of NetX Duo. This can compromise confidentiality, especially in critical infrastructure sectors such as industrial automation, energy, telecommunications, and healthcare, where embedded real-time operating systems are prevalent. Although the vulnerability does not directly affect system integrity or availability, leaked information could aid attackers in further exploitation or reconnaissance. The remote and unauthenticated nature of the exploit increases the risk profile, as attackers can target exposed network interfaces without needing credentials or user interaction. Organizations relying on IoT devices, embedded controllers, or networked sensors with NetX Duo are particularly vulnerable. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as exploit code could be developed following public disclosure. Failure to address this vulnerability could lead to regulatory compliance issues under GDPR if personal or sensitive data is exposed.

CWE-126Buffer Over-read (opens in a new tab)
Variant weakness
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
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)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/eclipse-threadx/netxduo/security/advisories/GHSA-9hw5-4xcv-jprm (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Oct 2025, 03:56 UTC

WeaknessesCWE-126

Technical details

References

Community reviews

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