Publication Date:
Last Update:
Current Version: V1.5
CVSS v3.1 Base Score: 7.5
Affected Product and Versions Remediation

All versions

All versions < V14 SP1 Update 14
Update to V14 SP1 Update 14 or later version

All versions

All versions < V16 Update 6
Update to V16 Update 6 or later version

All versions < V17 SP1

All versions < V2020 SP1
Update to V2020 SP1 or later version

For PCS neo: Update to PCS neo V3.1 SP1 (

For WinCC: contact local support

All versions < V8.0

All versions < V18

All versions < V18 SR 1

All versions < V3.1.1
  • Deactivate the OPC LDS Service if supported by the product use case. The LDS service is not activated in the default configuration
  • Use VPN for protecting network communication between cells

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 7.5
CWE CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

V1.0 (2022-05-10): Publication Date
V1.1 (2022-07-12): Added fix for SIMATIC NET PC Software V16
V1.2 (2022-08-09): Added fix for TeleControl Server Basic
V1.3 (2022-12-13): Added fix for SIMATIC WinCC Runtime Professional and SIMATIC WinCC Unified PC Runtime
V1.4 (2023-03-14): Added OpenPCS 7 to the list of affected products
V1.5 (2023-04-11): Added fix for SIMATIC WinCC