On an instance of TwinCAT 3 HMI Server running on a device an authenticated administrator can inject arbitrary content into the custom CSS field which is persisted on the device and later returned via the login page and error page.
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Fixes

Solution

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Workaround

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History

Wed, 21 Jan 2026 20:30:00 +0900

Type Values Removed Values Added
First Time appeared Beckhoff
Beckhoff twincat
Vendors & Products Beckhoff
Beckhoff twincat

Wed, 21 Jan 2026 05:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 20 Jan 2026 17:30:00 +0900

Type Values Removed Values Added
Description On an instance of TwinCAT 3 HMI Server running on a device an authenticated administrator can inject arbitrary content into the custom CSS field which is persisted on the device and later returned via the login page and error page.
Title Beckhoff: XSS Vulnerability in TwinCAT 3 HMI Server
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CERTVDE

Published:

Updated: 2026-01-20T19:32:34.439Z

Reserved: 2025-04-16T11:18:45.761Z

Link: CVE-2025-41768

cve-icon Vulnrichment

Updated: 2026-01-20T19:32:31.150Z

cve-icon NVD

Status : Received

Published: 2026-01-20T09:15:59.123

Modified: 2026-01-20T09:15:59.123

Link: CVE-2025-41768

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-21T20:19:40Z

Weaknesses