CVE-2026-25751: Fuxa Information Disclosure Vulnerability

CVE-2026-25751 Overview

CVE-2026-25751 is a critical information disclosure vulnerability affecting FUXA, a web-based Process Visualization (SCADA/HMI/Dashboard) software developed by Frangoteam. This vulnerability allows unauthenticated remote attackers to retrieve sensitive administrative database credentials from the system configuration, potentially leading to complete compromise of historical process data integrity and availability.

Critical Impact

Unauthenticated attackers can obtain InfluxDB administrative credentials, enabling unauthorized access to read, modify, or delete all historical process data, or perform Denial of Service attacks against industrial control system databases.

Affected Products

• FUXA versions through 1.2.9
• Frangoteam FUXA web-based SCADA/HMI/Dashboard deployments
• Systems with exposed FUXA instances accessible over the network

Discovery Timeline

• February 6, 2026 - CVE-2026-25751 published to NVD
• February 10, 2026 - Last updated in NVD database

Technical Details for CVE-2026-25751

Vulnerability Analysis

This vulnerability stems from a missing authentication mechanism (CWE-306) in FUXA's configuration retrieval functionality. The flaw enables unauthenticated remote attackers to access sensitive system configuration data without requiring any credentials or prior authentication. The exposed configuration includes administrative credentials for the InfluxDB database backend, which FUXA uses to store historical process data from SCADA/HMI operations.

The attack can be conducted entirely over the network without any user interaction, making it particularly dangerous in industrial control system environments where FUXA instances may be exposed to corporate networks or, in misconfigured deployments, the internet. Successful exploitation provides attackers with the credentials necessary to directly access the underlying database infrastructure.

Root Cause

The root cause of CVE-2026-25751 is the absence of proper authentication controls (CWE-306: Missing Authentication for Critical Function) on endpoints that expose sensitive configuration data. FUXA fails to verify that requests for system configuration information originate from authenticated and authorized users, allowing any network-accessible attacker to retrieve this data.

Attack Vector

The attack vector for this vulnerability is network-based. An unauthenticated attacker with network access to a vulnerable FUXA instance can exploit this flaw by sending crafted requests to retrieve the system configuration. The attacker does not require any prior authentication, user interaction, or special privileges to execute the attack.

Upon successful exploitation, the attacker obtains InfluxDB administrative credentials, which can then be used to:

• Authenticate directly to the InfluxDB database service
• Read all historical process data collected by the SCADA/HMI system
• Modify or delete critical industrial process historical records
• Corrupt the database to cause Denial of Service conditions

For detailed technical information, refer to the GitHub Security Advisory GHSA-c5gq-4h56-4mmx.

Detection Methods for CVE-2026-25751

Indicators of Compromise

• Unexpected or unauthorized access attempts to FUXA configuration endpoints from external IP addresses
• Direct authentication attempts to InfluxDB from IP addresses that have not previously connected to FUXA
• Unusual database query patterns or bulk data extraction from InfluxDB historical process tables
• Failed or successful authentication events in InfluxDB logs from unknown sources

Detection Strategies

• Monitor web server access logs for unauthenticated requests to configuration-related endpoints in FUXA
• Implement network intrusion detection rules to identify reconnaissance activity targeting FUXA installations
• Enable and review InfluxDB authentication logs for unexpected credential usage patterns
• Deploy SentinelOne Singularity to detect post-exploitation activities following credential theft

Monitoring Recommendations

• Configure alerts for any direct network connections to InfluxDB from hosts other than the FUXA application server
• Implement database activity monitoring to detect unauthorized read, write, or delete operations on process data tables
• Establish baseline network traffic patterns for FUXA deployments and alert on deviations
• Review FUXA access logs regularly for evidence of configuration enumeration attempts

How to Mitigate CVE-2026-25751

Immediate Actions Required

• Upgrade FUXA immediately to version 1.2.10 or later, which contains the security patch for this vulnerability
• Restrict network access to FUXA instances using firewalls or network segmentation to limit exposure
• Rotate InfluxDB credentials immediately if exploitation is suspected or if running vulnerable versions
• Audit InfluxDB access logs for any unauthorized authentication attempts or data access

Patch Information

Frangoteam has released FUXA version 1.2.10 which addresses this information disclosure vulnerability. The patch is available via the GitHub FUXA Release v1.2.10. Organizations should prioritize upgrading all FUXA deployments to this version or later to remediate CVE-2026-25751.

For additional details on the vulnerability and remediation guidance, consult the GitHub Security Advisory GHSA-c5gq-4h56-4mmx.

Workarounds

• Implement network-level access controls to restrict FUXA access to trusted IP addresses only until patching is complete
• Deploy a reverse proxy with authentication in front of FUXA to add an authentication layer
• Isolate FUXA instances in a dedicated network segment with strict ingress and egress filtering
• Monitor InfluxDB connections and block any authentication attempts from unauthorized sources

# Example: Restrict FUXA access using iptables (adjust IP ranges as needed)
# Allow only trusted management network to access FUXA
iptables -A INPUT -p tcp --dport 1881 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 1881 -j DROP