External risk intelligence

MOOS essential-moos pAntler Remote Code Execution via Unauthenticated Mission File.

CVE advisorySeverity: CRITICAL (CVSS 9.2)

CVE-2026-85427

MOOS (Mission Oriented Operating Suite) is typically used for autonomous vehicle and robotics research. While network-reachable, these systems are generally deployed within closed, specialized research or field networks rather than exposed directly to the public internet.

Remote Code Execution

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in MOOS essential-moos allows unauthenticated attackers to execute arbitrary programs over the network by sending a specially crafted message. This could potentially lead to unauthorized code execution within affected systems.

Attackers can run programs remotely.
Remember for potential autonomous systems.
Confirm relevance and exposure of affected systems.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending a specially crafted message to the MOOSDB, a communication system used in robotics. This message, containing a malicious "MISSION_FILE," bypasses authentication and tricks the pAntler component into executing arbitrary commands. This could allow an attacker to take control of the system.

Attacker publishes crafted message to MOOSDB.
Vulnerable component parses and executes malicious content.
Unauthenticated remote code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary programs on a system running the affected software. This is possible when the attacker can publish a specially crafted `MISSION_FILE` message to the MOOSDB, causing the `pAntler` component to parse and run malicious commands.

Arbitrary program execution.
Crafted message published to MOOSDB.
System compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

The MOOSDB and its pAntler component, used in robotics and autonomous systems, contain a critical remote code execution vulnerability. This means that the teams responsible for managing these specialized research or field network environments need to act. The first practical step is to identify all instances of the affected technology within these networks, assess their reachability and criticality, locate the accountable system owners, and then develop a remediation plan based on the identified risk.

Application or Platform Engineering owns the issue.
Verify MOOSDB/pAntler instances and network exposure.
Plan coordinated remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Free EASM Trial See How Signal Works

Frequently asked questions

What is MOOS and pAntler?

MOOS, or Mission Oriented Operating Suite, is middleware used primarily for robotics and autonomous vehicle research. Within this ecosystem, pAntler acts as a process manager designed to launch and coordinate various mission-critical applications by parsing mission configuration files.

How does CVE-2026-85427 work?

This vulnerability is classified as CWE-494, which involves the insecure loading of code. In this specific case, pAntler fails to validate the source or integrity of the instructions it receives. It automatically executes commands defined within a mission file, allowing an attacker to trigger arbitrary code execution by masquerading as a legitimate system component.

Do I need to be authenticated to trigger this?

No. The vulnerability exists because the communication between the MOOSDB and pAntler does not require authentication. An attacker simply needs to publish a maliciously crafted MISSION_FILE message to the MOOSDB. If the attacker cannot reach or communicate with the specific MOOSDB instance over the network, this trigger path remains inaccessible.

Why is this a concern for my systems?

According to Halo Surface Signal, while MOOS is typically used in specialized research or robotics field networks, any instance reachable over a network is at risk. Even if your system is not on the public internet, it may be vulnerable if an attacker gains a foothold in your internal or lab network where the MOOSDB communicates.

What is the first step to address this?

Begin by auditing your infrastructure to identify all active instances of essential-moos and pAntler. Once located, verify their network accessibility to determine which instances are most exposed. Coordinate with your engineering teams to confirm the system owner and establish a remediation plan to restrict unauthorized access to the MOOSDB until official patches are applied.

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.