9.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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CVE-2026-25752

CVE-2026-25752: FUXA Unauthenticated Remote Arbitrary Device Tag Write

FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. An authorization bypass vulnerability in FUXA allows an unauthenticated, remote attacker to modify device tags via WebSockets. Exploitation allows an unauthenticated, remote attacker to bypass role-based access controls and overwrite arbitrary device tags or disable communication drivers, exposing connected ICS/SCADA environments to follow-on actions. This may allow an attacker to manipulate physical processes and disconnected devices from the HMI. This affects FUXA through version 1.2.9. This issue has been patched in FUXA version 1.2.10.

(GitHub Advisory)

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CVE-2026-25752

CVE-2026-25752:

9.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
fuxa-server	npm	<= 1.2.9	1.2.10

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability lies in the WebSocket event handlers within the init function in server/runtime/index.js. The patch eb2d8a20964ce7acaa0f442a181390a5f726a1ae introduces a new function, isSocketWriteAuthorized, to check if a socket has the authority to perform write operations. This check is then applied to the event handlers for Events.IoEventTypes.DEVICE_VALUES and Events.IoEventTypes.DEVICE_ENABLE. Before the patch, these handlers would directly call devices.setDeviceValue and devices.enableDevice respectively, without any authorization check. This allowed any unauthenticated user connected via WebSockets to modify device tags and enable or disable devices, leading to the authorization bypass vulnerability. Since these event handlers are anonymous functions defined within the init function, the init function is identified as the vulnerable function that would appear in a runtime profile during exploitation.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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