CVE-2025-55093VulnerabilityPublished 17 Oct 2025

CVE-2025-55093: 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: 0.3% chance of exploitation in 30 days – higher than 23% 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:N/VI:L/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: None
Vulnerable system integrity: Low
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: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to 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 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

To mitigate CVE-2025-55093, organizations should prioritize updating NetX Duo to version 6.4.4 or later as soon as the patch becomes available from the Eclipse Foundation. In the interim, network administrators should implement strict network segmentation and isolate devices running vulnerable NetX Duo versions from untrusted networks. Deploying DHCP traffic filtering at network boundaries can prevent malicious unicast DHCP packets from reaching vulnerable devices. Monitoring network traffic for anomalous DHCP packets and employing intrusion detection systems tuned for DHCP anomalies can provide early warning of exploitation attempts. Additionally, organizations should conduct an inventory of embedded and IoT devices using NetX Duo to assess exposure and apply compensating controls such as disabling unnecessary DHCP services or restricting device management interfaces. Vendor engagement is recommended to confirm patch availability and coordinate timely updates. Finally, integrating these devices into a broader vulnerability management and incident response program will enhance resilience against exploitation.

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_ipv4_packet_receive() when handling unicast DHCP messages that could cause corruption of 4 bytes of memory.

Impact

For European organizations, the primary impact of CVE-2025-55093 lies in the potential compromise of embedded and IoT devices that utilize NetX Duo for network connectivity, especially those relying on DHCP for IP configuration. Exploitation could lead to memory corruption, which may cause information leakage or destabilize the device's networking stack, resulting in intermittent connectivity issues or denial of service. This can disrupt critical industrial control systems, smart infrastructure, or other networked embedded applications prevalent in sectors like manufacturing, energy, and transportation. The vulnerability's remote exploitability without authentication increases the attack surface, particularly in environments where devices are exposed to untrusted networks or insufficiently segmented internal networks. Although no active exploits are known, the presence of this flaw could be leveraged by attackers to gain footholds or pivot within networks. The impact on confidentiality and integrity, while limited, is significant enough to warrant attention due to the critical roles these devices often play in operational technology environments.

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-c9pq-93jp-w649 (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, 05:31 UTC

WeaknessesCWE-126

Technical details

References

Community reviews

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