CVE-2025-41768
Unknown Unknown - Not Provided
Persistent CSS Injection in TwinCAT 3 HMI Server by Admin

Publication date: 2026-01-20

Last updated on: 2026-02-12

Assigner: CERT VDE

Description
An high privileged remote attacker can inject arbitrary content into the custom CSS field on the affected devices due to improper neutralization of input during web page generation ('Cross-site Scripting').
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Meta Information
Published
2026-01-20
Last Modified
2026-02-12
Generated
2026-06-16
AI Q&A
2026-01-20
EPSS Evaluated
2026-06-15
NVD
CVE-2025-41768
EUVD
EUVD-2026-3464
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
beckhoff twincat_3_hmi_server *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability allows an authenticated administrator on a TwinCAT 3 HMI Server instance to inject arbitrary content into the custom CSS field. This injected content is stored on the device and later displayed on the login page and error page.

Impact Analysis

The vulnerability can impact you by allowing an authenticated administrator to inject malicious content into the device's custom CSS field, which is then rendered on the login and error pages. This could lead to information disclosure or manipulation of the user interface, potentially misleading users or exposing sensitive information.

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