External risk intelligence

Eclipse Cyclone DDS Certificate Check Bypass Executes Commands as System.

CVE advisorySeverity: CRITICAL (CVSS 10.0)

CVE-2025-67109

Eclipse Cyclone DDS is a middleware library used for internal machine-to-machine communication in robotics, industrial, and automotive systems. It is typically deployed within private, isolated local networks or embedded environments rather than as a public-facing internet service.

Eclipse Cyclone Data Distribution Service

before 0.10.5

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a vulnerability in Eclipse Cyclone DDS, a system for machine-to-machine communication, that could allow attackers to bypass security checks and gain high-level system control. The main concern is confirming relevance and exposure due to the nature of the affected technology.

Allows unauthorized system control.
Matters for secure internal communication.
Confirm system relevance and exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted network traffic to a system running the affected software. This traffic could trick the software into improperly verifying a time certificate, allowing the attacker to bypass security checks and potentially gain control of the system, leading to command execution with high-level privileges.

No special access needed.
Triggered by network certificate verification.
Risk of unauthorized command execution.

Live Threat

Current exploitation, exposure, and threat context

Improper verification of time certificates in Eclipse Cyclone DDS could allow attackers to bypass security checks and potentially execute commands with system privileges. This could affect systems that rely on this middleware for secure communication, especially if deployed in environments where external network access is present.

System commands and data integrity.
Bypassing certificate checks remotely.
Unauthorized system-level command execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-world action for this vulnerability likely falls to the teams managing the Eclipse Cyclone DDS middleware, which could include platform or infrastructure engineers, depending on how the service is deployed and consumed. The first practical step is to inventory all instances of Eclipse Cyclone DDS, determine their network exposure, assess their criticality to business operations, and identify the specific system owners responsible for each deployment. Remediation planning should then proceed based on the risk profile of each instance.

Platform or infrastructure teams own remediation.
Verify external reachability and system criticality.
Plan upgrades or apply vendor guidance.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is Eclipse Cyclone DDS?

Eclipse Cyclone DDS is a middleware library designed to handle machine-to-machine communication. It serves as a foundational data distribution framework, frequently integrated into robotics, industrial automation, and automotive systems to ensure components can exchange information reliably within their operational environment.

How does CVE-2025-67109 work?

This vulnerability is classified as Improper Verification of Certificate (CWE-298). It occurs when the software fails to correctly validate time-based security certificates. By bypassing these checks, an unauthorized actor can trick the system into accepting illegitimate requests, ultimately leading to the execution of commands with high-level System privileges.

Do I need to be authenticated to trigger this flaw?

No. The vulnerability does not require prior authentication or special user access to initiate. It is triggered by the arrival of specifically crafted network traffic intended to exploit the flawed certificate verification logic. Note that simply running the service does not trigger the bug; the system must process the malicious, specially crafted traffic to be impacted.

Is my system at risk if it is not internet-facing?

Halo Surface Signal indicates that Cyclone DDS is generally deployed within private, isolated local networks or embedded environments, making direct internet-facing exposure less common. However, because the vulnerability is network-based, any system reachable over the network where this middleware is active remains at risk if an attacker gains access to that internal segment.

When should I prioritize patching?

You should prioritize this by first creating an inventory of all instances of Eclipse Cyclone DDS in your environment. Once identified, evaluate the network accessibility and business criticality of each system. Use this assessment to determine which deployments require immediate attention and coordinate with the infrastructure teams responsible for applying the necessary updates.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.