Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the Trace page.

This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing a specially crafted trace file. Successful exploitation could allow attacker-controlled JavaScript to execute in the user’s browser session and perform PLC operations through the web server within the scope of the user’s authorization.

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Fixes

Solution

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Workaround

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History

Tue, 13 Oct 2026 10:45:00 +0000

Type Values Removed Values Added
Title Stored XSS via Unsanitized Trace Import in Siemens PLC Controllers

Tue, 13 Oct 2026 09:45:00 +0000

Type Values Removed Values Added
Description Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the Trace page. This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing a specially crafted trace file. Successful exploitation could allow attacker-controlled JavaScript to execute in the user’s browser session and perform PLC operations through the web server within the scope of the user’s authorization.
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: siemens

Published:

Updated: 2026-10-13T09:18:39.856Z

Reserved: 2026-07-16T14:30:16.082Z

Link: CVE-2026-63353

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-13T10:17:18.040

Modified: 2026-10-13T10:17:18.040

Link: CVE-2026-63353

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T10:30:19Z

Weaknesses