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Festo Reports Vulnerability in Didactic Products Linked to Siemens TIA-Portal

Source Decision Insights Threat Desk Published November 20, 2025 Companies 2
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2 companies named across 8 categories, one of 58 articles referencing Siemens. Previous coverage: Delta and Siemens form partnership to enhance data center solutions (Nov 2025).

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1. EXECUTIVE SUMMARY

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow the creation or overwriting of arbitrary files in the engineering system.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Festo reports that the following products contain affected versions of Siemens TIA-Portal:

  • Siemens TIA-Portal V15 prior to V17 Update 6 installed on Festo Hardware Manufacturing Execution System (MES) PC: All versions
  • Siemens TIA-Portal V18 prior to V18 Update 1 installed on Festo Hardware MES PC: All versions
  • Siemens TIA-Portal V15 prior to V17 Update 6 installed on Festo Hardware TP260 (
  • Siemens TIA-Portal V18 prior to V18 Update 1 installed on Festo Hardware TP260 (

3.2 VULNERABILITY OVERVIEW

3.2.1 Improper Input Validation CWE-20

A vulnerability has been identified in Siemens Totally Integrated Automation Portal (TIA Portal) V15, V16, V17, and V18. The affected products contain a path traversal vulnerability that could allow the creation or overwriting of arbitrary files in the engineering system. If the user is tricked into opening a malicious PC system configuration file, an attacker could exploit this vulnerability to achieve arbitrary code execution.

CVE-2023-26293 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Communications, Critical Manufacturing, Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Festo coordinated this vulnerability with Computer Emergency Readiness Team (CERT)@VDE.

4. MITIGATIONS

Festo recommends users of affected devices update TIA-Portal. Refer to Siemens SSA-116924 for more details.

For more information, see the associated Festo SE & Co. KG security advisory FSA-202303 FSA-202303: Festo: Vulnerable Siemens TIA-Portal in multiple Festo Didactic products - HTML and FSA-202303: Festo: Vulnerable Siemens TIA-Portal in multiple Festo Didactic products - CSAF.

CISA recommends users take the following measures to protect themselves from social engineering attacks:

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.

5. UPDATE HISTORY

  • November 20, 2025: Initial Republication of Festo FSA-202303

Blog post, originally published by CISA at cisa.gov.

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