CVE-2026-25938: FUXA Node-RED Authentication Bypass and Remote Code Execution - What It Means for Your Business and How to Respond

Introduction

CVE-2026-25938 is a critical security vulnerability affecting certain versions of FUXA, a web-based platform used to visualize and manage industrial processes. If your organization uses FUXA with the Node-RED integration enabled, an attacker may be able to gain access without valid credentials and take control of the underlying server.

This issue matters because industrial visualization systems often connect business operations, production environments, facilities, and sensitive internal networks. A compromise could disrupt operations, expose data, or create a pathway into other systems.

This article explains the business impact, who may be affected, how to identify exposure, and what actions decision-makers should prioritize. A technical appendix provides verification and remediation guidance for security engineers, penetration testers, and information technology professionals.

S1 — Background & History

CVE-2026-25938 affects FUXA versions 1.2.8 through 1.2.10 when the Node-RED plugin is enabled. FUXA is developed by frangoteam and provides process visualization, supervisory control and data acquisition interfaces, human-machine dashboards, and related operational views.

The vulnerability was publicly published on February 9, 2026, through a security advisory maintained by GitHub. The Common Vulnerabilities and Exposures record identifies the issue as an unauthenticated remote code execution vulnerability caused by an authentication bypass. The Common Vulnerability Scoring System version 4.0 score is 9.5, rated Critical. The issue is fixed in FUXA version 1.2.11.

In plain language, an attacker may be able to reach the affected service remotely, bypass authentication, and run commands on the server. The listed weakness categories are authentication bypass by spoofing and missing authentication for a critical function.

S2 — What This Means for Your Business

If you operate an affected FUXA deployment, you may face more than an ordinary software update. An attacker who gains control of the FUXA server could interfere with dashboards, disrupt monitoring, alter connected workflows, or use the system as a stepping stone toward other business or operational technology assets.

The effect depends on how FUXA is deployed. A system used only for internal reporting may primarily create confidentiality and availability risks. A system connected to production equipment, building controls, utilities, or other operational systems may create a broader safety and continuity concern.

You may also need to consider exposure of credentials, process information, customer data, proprietary operating procedures, and network details. A compromise could trigger incident response costs, contractual reporting obligations, cyber insurance requirements, or regulatory review, especially if the affected server connects to systems handling personal information or regulated operations.

For U.S. and Canadian organizations, the practical priority is to determine whether the vulnerable software is exposed, whether the Node-RED integration is active, and whether the server can reach sensitive environments. Treat the issue as a business risk requiring coordinated action from technology, security, operations, and leadership teams.

S3 — Real-World Examples

Regional Bank: A regional bank uses FUXA to display facility and environmental information across several branches. An attacker compromises an exposed server, disrupts monitoring, and uses the host to probe internal systems, creating operational downtime and a potential incident involving sensitive network information.

Manufacturing Company: A midsize manufacturer connects FUXA dashboards to production processes. A compromise could make production information unreliable, interrupt plant operations, or force the company to shut down affected systems while validating that equipment and process data remain trustworthy.

Municipal Utility: A local utility uses FUXA to visualize water or wastewater operations. Unauthorized control of the application server could affect service visibility, delay operational decisions, and increase pressure on the utility to demonstrate that its operational technology environment remains safe.

Large Enterprise: A multinational company runs multiple FUXA instances across regional facilities. Inconsistent asset inventories may leave one older deployment unpatched, allowing an attacker to establish an initial foothold and move toward shared services or other business-critical environments.

S4 — Am I Affected?

• You are potentially affected if you run FUXA version 1.2.8, 1.2.9, or 1.2.10.
• You are at direct risk if the Node-RED plugin is enabled in an affected deployment.
• You should treat the system as exposed if it is reachable from the public internet, an untrusted partner network, or a broad internal network.
• You should investigate further if your asset inventory lists FUXA but does not record its exact version or enabled integrations.
• You should review connected systems if FUXA can communicate with production equipment, facility controls, databases, identity services, or administrative networks.
• You should upgrade to FUXA version 1.2.11 or a later vendor-supported release after confirming compatibility.
• You should investigate possible compromise if you observe unexpected administrative activity, unusual outbound connections, unexplained process changes, or unauthorized modifications.

Key Takeaways

• CVE-2026-25938 affects FUXA versions 1.2.8 through 1.2.10 when the Node-RED plugin is enabled.
• The issue is rated Critical because an unauthenticated remote attacker may execute code on the affected server.
• Your greatest business risks include operational disruption, unauthorized access, data exposure, and movement into connected networks.
• You should identify vulnerable deployments, restrict exposure, review activity, and apply FUXA version 1.2.11 or later.
• A focused penetration test can help determine whether the vulnerability is reachable and whether related weaknesses increase the potential impact.

Call to Action

Do not let an overlooked visualization server become an entry point into your business. IntegSec can assess your FUXA deployment, test externally and internally reachable attack paths, and help prioritize practical cybersecurity improvements. Visit IntegSec to arrange a penetration test and reduce risk with clear, evidence-based guidance.

TECHNICAL APPENDIX

A — Technical Analysis

CVE-2026-25938 is an authentication bypass affecting the Node-RED integration in FUXA versions 1.2.8 through 1.2.10. The vulnerable functionality permits an unauthenticated remote attacker to achieve arbitrary code execution on the FUXA server when the integration is enabled. The affected component is the FUXA web application and its Node-RED integration layer.

The published CVSS 4.0 vector is CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H, with a score of 9.5 and Critical severity. The vector indicates network reachability, low attack complexity, no privileges required, no user interaction, and high impacts to confidentiality, integrity, and availability on both the vulnerable system and potentially connected systems. The attack requires the affected precondition, namely the relevant Node-RED integration being enabled.

The vulnerability is mapped to CWE-290, Authentication Bypass by Spoofing, and CWE-306, Missing Authentication for Critical Function. The NVD record and vendor advisory identify FUXA version 1.2.11 as the patched release.

B — Detection & Verification

• Enumerate installed versions from deployment manifests, container metadata, package records, or the FUXA interface. Example commands include docker ps --format '', docker inspect <container>, and grep -R "version" /path/to/fuxa/package.json.
• Confirm whether the Node-RED integration is enabled by reviewing FUXA configuration, deployment files, plugin directories, and startup logs.
• Search vulnerability management platforms for the product name frangoteam FUXA and versions 1.2.8, 1.2.9, and 1.2.10. Scanner signatures should validate the version and integration state rather than rely only on a service banner.
• Review web access logs for unauthenticated requests to Node-RED or integration endpoints, unexpected HTTP methods, abnormal request rates, and administrative actions without a corresponding authenticated session.
• Investigate new child processes, shell execution, modified application files, unexpected Node.js activity, outbound connections, and changes to dashboards or flows.
• Correlate network telemetry for inbound access from untrusted ranges and outbound connections from the FUXA host to internet destinations or restricted internal segments.

Testing should occur only with authorization. Verification should begin with passive enumeration and controlled authenticated review before any exploit validation is attempted.

C — Mitigation & Remediation

1. Immediate, 0–24 hours: Identify every FUXA deployment and isolate affected instances from the public internet and unnecessary internal networks. Restrict access through firewalls, private network controls, or a tightly scoped reverse proxy. Disable the Node-RED integration if business operations permit, and preserve relevant logs and system images before making substantial changes. Review signs of compromise because authentication bypass vulnerabilities may be exploited before detection.
2. Short-term, 1–7 days: Apply the official vendor fix by upgrading affected deployments to FUXA version 1.2.11 or a later supported release. Validate application functionality, dashboards, integrations, and operational dependencies in a controlled environment before production rollout. Rotate credentials and tokens accessible from the affected server if compromise cannot be ruled out. Reassess firewall rules, service accounts, and connectivity to operational technology and business networks.
3. Long-term, ongoing: Add FUXA and related integrations to formal asset and software inventories. Establish recurring vulnerability scans, version monitoring, centralized logging, and alerting for suspicious process creation and outbound traffic. Segment visualization servers from control networks and administrative systems, apply least-privilege service accounts, and conduct a targeted penetration test after remediation.

If immediate patching is impossible, keep the service off the public internet, permit access only from explicitly approved management networks, disable the vulnerable integration where feasible, and monitor the host continuously. These measures reduce exposure but do not replace the official patch.

D — Best Practices

• Maintain an accurate inventory of FUXA instances, versions, plugins, containers, and connected systems.
• Treat authentication integrations as critical attack surfaces and verify that every administrative function enforces authentication.
• Place industrial visualization servers behind network segmentation and deny unnecessary outbound connections.
• Use least-privilege service accounts, rotate credentials after suspected exposure, and remove unused integrations.
• Monitor authentication events, process creation, configuration changes, and unusual network activity on every FUXA host