Publication Date:
Last Update:
Current Version: V1.1
CVSS v3.1 Base Score: 10.0
Affected Product and Versions Remediation

All versions

All versions

Switch to "Single terminal system" (as described in the section Workarounds and Mitigations). Alternatively, consider migrating the STEP 7 project to the latest version of TIA Portal and uninstall S7-PM

All versions < V5.7
  • If multiple Engineering Systems are in use limit remote access to port 2638/tcp to trusted systems only
  • If multiple Engineering Systems are in use ensure that the user accounts in use are restricted to the minimum required operating rights

  • If only one Engineering System is in use, consider changing to "Single terminal system" mode in the "Configure SIMATIC Workspace/Workstation" application, under the "Workstation Configuration" tab. Restart the computer. More details can be found in the following FAQ:

Product-specific remediations or mitigations can be found in the section Affected Products and Solution.
Please follow the General Security Recommendations.

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download:, and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at:

The vulnerability classification has been performed by using the CVSS scoring system in version 3.1 (CVSS v3.1) ( The CVSS environmental score is specific to the customer’s environment and will impact the overall CVSS score. The environmental score should therefore be individually defined by the customer to accomplish final scoring.

An additional classification has been performed using the CWE classification, a community-developed list of common software security weaknesses. This serves as a common language and as a baseline for weakness identification, mitigation, and prevention efforts. A detailed list of CWE classes can be found at:

CVSS v3.1 Base Score 10.0
CWE CWE-94: Improper Control of Generation of Code ('Code Injection')

  • Thomas Riedmaier from Siemens Energy for reporting the vulnerability

V1.0 (2023-06-13): Publication Date
V1.1 (2023-07-11): Added a new mitigations to all affected products, adjusted summary and CVSS score