External risk intelligence

FUXA Authorization Bypass Allows Arbitrary Code Execution

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-42922

FUXA is a web-based SCADA/HMI platform designed to provide monitoring and control interfaces. These applications are frequently deployed as web servers accessible via the internet or wide-area networks to allow remote visibility and management of industrial processes, making the /nodered functionality, which is part of its web interface, commonly reachable from external networks.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical authorization bypass vulnerability has been identified in FUXA's /nodered functionality, allowing unauthenticated attackers to execute arbitrary code. This issue is particularly concerning as FUXA is a web-based SCADA/HMI platform often exposed externally for remote industrial process monitoring and control.

Unauthorized code execution is possible.
FUXA is used for industrial control systems.
Confirm FUXA relevance and potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this by sending a malicious HTTP request to the FUXA application's `/nodered` feature. This bypasses normal authorization checks, allowing an unauthenticated user to potentially execute arbitrary code on the system.

No authentication required to attack.
Triggered via crafted HTTP request.
Allows arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in the /nodered functionality of FUXA could allow an unauthenticated attacker to bypass authorization controls and execute arbitrary code by sending a specially crafted HTTP request. This could affect the integrity and availability of the SCADA/HMI system.

System code and configuration at risk.
Arbitrary code execution via unauthenticated request.
Compromised system integrity and availability.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical vulnerability in FUXA's `/nodered` functionality could allow unauthenticated attackers to execute arbitrary code. Owners of industrial control systems or SCADA environments utilizing FUXA should prioritize identifying instances of this technology, confirming its exposure to external networks, and assessing its business criticality to inform remediation planning. Coordination with vendor management teams may be necessary if FUXA is a third-party application.

Identify and prioritize FUXA deployments.
Verify external reachability and criticality.
Plan remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is FUXA and what is it used for?

FUXA is a web-based SCADA and HMI platform. It serves as a centralized interface for monitoring and controlling industrial processes, allowing operators to visualize data and manage hardware systems through a browser-based dashboard.

What does this CVE-2026-42922 vulnerability mean?

This is an authorization bypass flaw categorized under CWE-285. In plain terms, it means the software's security checks are broken. Because of this, an unauthorized person can skip the login process and force the system to run arbitrary, unintended code.

How is this vulnerability triggered?

An attacker triggers this by sending a specially crafted HTTP request directly to the /nodered endpoint of the application. It does not require any prior authentication or special user permissions to execute. Simply sending the malicious request to that specific part of the web interface is sufficient.

Is my system at risk if it is not exposed to the internet?

Halo Surface Signal indicates that FUXA instances are frequently deployed on internet-facing networks to allow for remote industrial management. If your system is strictly internal and unreachable from external networks, the likelihood of an attacker reaching this specific component is significantly lower, though internal security practices should still apply.

What should I do if I am running FUXA?

First, locate and inventory all active FUXA deployments in your environment. Confirm which of these are reachable from external networks and evaluate how critical these systems are to your operations. Use this information to coordinate with your technical teams to plan for the necessary updates or configuration changes.

References

talosintelligence.com/vulnerability_reports/TALOS-2026-2419

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.