CVE-2026-25751: Critical Information Disclosure in FUXA SCADA Software

Introduction

Industrial control systems are increasingly exposed to the same classes of vulnerabilities long familiar to web applications. CVE-2026-25751 is a good example of how a single information disclosure issue can cascade into full system compromise when it affects SCADA and HMI platforms.

This post explains what FUXA is, what went wrong, why the impact is serious, and what operators should do about it.

What is FUXA?

FUXA is an open-source, web-based process visualization platform used for SCADA, HMI, and industrial dashboards. It is designed to provide real-time monitoring and visualization of industrial processes through a browser-based interface.

Typical FUXA deployments integrate with industrial protocols and store historical telemetry and process data in an InfluxDB backend. Because of this role, FUXA often sits close to critical operational data and, in some environments, directly interfaces with production systems.

Overview of CVE-2026-25751

CVE-2026-25751 is an information disclosure vulnerability that affects FUXA versions up to and including 1.2.9.

The flaw allows an unauthenticated remote attacker to retrieve sensitive administrative database credentials. No authentication is required, and the attack can be carried out remotely over the network.

Once exploited, the attacker can obtain the full FUXA system configuration, including administrative credentials for the InfluxDB database used to store process data.

The issue has been fixed in FUXA version 1.2.10.

Why This Vulnerability Is Dangerous

At first glance, information disclosure might sound less severe than remote code execution. In this case, the consequences are far more serious than the label suggests.

With access to InfluxDB administrative credentials, an attacker may be able to:

• Authenticate directly to the database service
• Read all historical process and telemetry data
• Modify or delete records, undermining data integrity
• Corrupt the database and trigger a denial of service
• Disrupt monitoring, alerting, and operational visibility

In industrial environments, loss or manipulation of historical data can have real-world safety, compliance, and operational consequences.

Severity and CVSS Score

While the NVD has not yet published its own assessment, the CVE was assigned a CVSS 4.0 base score of 9.1 (Critical) by GitHub, Inc., the CNA.

CVSS Vector:

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

Key points from the scoring:

• Network-accessible
• No authentication required
• High impact to confidentiality
• High impact to system and data security in a shared environment

This rating aligns with the reality that the vulnerability enables complete compromise of backend data systems.

Affected Versions

Vulnerable: FUXA versions through 1.2.9

Patched: FUXA 1.2.10 and later

Any internet-facing or internally accessible FUXA instance running a vulnerable version should be considered at risk.

Mitigation and Recommendations

If you are using FUXA, take the following steps immediately:

Upgrade to FUXA 1.2.10

This version includes the official fix for CVE-2026-25751.

Rotate Database Credentials

Assume exposed credentials may have been compromised. Change all InfluxDB administrative passwords after upgrading.

Restrict Network Exposure

Avoid exposing FUXA and database services directly to untrusted networks. Use firewalls, VPNs, and segmentation.

Monitor for Suspicious Activity

Review database logs for unexpected access, data deletion, or configuration changes.

Broader Lessons

CVE-2026-25751 highlights a recurring issue in industrial and OT-adjacent software: backend credentials stored in ways that can be exposed without authentication.

As SCADA and HMI systems continue to adopt web technologies, traditional web security practices like access control, secrets management, and least privilege become just as important as protocol-level safety.

Treat visualization layers as critical infrastructure components, not just dashboards.

Final Thoughts

This vulnerability is a reminder that even read-only or monitoring-focused systems can become high-impact attack vectors when they expose backend credentials.

If you run FUXA, patch promptly, review your architecture, and treat database access as a core security boundary.

Critical infrastructure security often fails not because of exotic exploits, but because of simple exposure combined with powerful access.

References