CVE-2026-63354: Siemens SIMATIC S7-1500 XSS in trace file import

CVE-2026-63354 · Severity: critical · CVSS 9.6 · Published 2026-10-13

Siemens SIMATIC S7-1500 and related PLCs are programmable logic controllers that manage industrial processes and automation. A vulnerability in the web server fails to sanitize visual marker data from imported CSV trace files, allowing an attacker to trick an authorized user into uploading a malicious file that executes JavaScript in their browser. An attacker could exploit this to perform PLC operations such as stopping production, altering configurations, or causing industrial disruption within the scope of the user's permissions.

Technologies: Siemens SIMATIC Drive Controller CPU 1504D TF, Siemens SIMATIC Drive Controller CPU 1507D TF, Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN, Siemens SIMATIC ET 200SP CPU 1510SP-1 PN, Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN, Siemens SIMATIC ET 200SP CPU 1512SP-1 PN, Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN, Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC, Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2, Siemens SIMATIC S7-1500 CPU family. Vendors: Siemens.

Quick answers

Is CVE-2026-63354 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-63354 being exploited in the wild.
How severe is CVE-2026-63354?
Critical severity, with a CVSS score of 9.6, published 13 October 2026.
Which products and versions are affected?
Siemens SIMATIC Drive Controller CPU 1504D TF all versions; Siemens SIMATIC Drive Controller CPU 1507D TF all versions; Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN all versions; Siemens SIMATIC ET 200SP CPU 1510SP-1 PN all versions; and 7 more.
Is there a fix for CVE-2026-63354?
No fixed version is recorded yet. Restrict access to the web server to trusted networks and implement strong authentication controls. Limit the function right "Read diagnostics" to only authorized personnel and educate users not to import CSV trace files from untrusted sources. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-63354 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-63354?
Check whether you run Siemens SIMATIC Drive Controller CPU 1504D TF, Siemens SIMATIC Drive Controller CPU 1507D TF, Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Restrict access to the web server to trusted networks and implement strong authentication controls. Limit the function right "Read diagnostics" to only authorized personnel and educate users not to import CSV trace files from untrusted sources.

Technical details

The web server does not properly validate or sanitize visual marker data in CSV trace files before rendering it on the Trace page, allowing stored cross-site scripting (XSS). Attack requires social engineering an authorized user with "Read diagnostics" function right to import a specially crafted CSV trace file. Successful exploitation allows attacker-controlled JavaScript execution in the user's browser session, enabling PLC operations within the scope of the user's authorization; no fixes are currently available.

Affected products

  • Siemens SIMATIC Drive Controller CPU 1504D TF all versions
  • Siemens SIMATIC Drive Controller CPU 1507D TF all versions
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 all versions
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC3 all versions
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC all versions
  • Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN all versions
  • Siemens SIMATIC ET 200SP CPU 1510SP-1 PN all versions
  • Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN all versions
  • Siemens SIMATIC ET 200SP CPU 1512SP-1 PN all versions
  • Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN all versions
  • Siemens SIMATIC S7-1500 CPU family all versions

Timeline

  • 2026-10-13: disclosed

References

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