Publication Date:
Last Update:
Current Version: V1.3
CVSS v3.1 Base Score: 6.3
Affected Product and Versions Remediation

All versions
Install SIMATIC WinCC V7.4 SP1 Update 19 or later version

All versions
Update to V9.0 SP3 UpdateCollection04 or later version

All versions < V9.1 SP1

All versions < V7.4 SP1 Update 19
Update to V7.4 SP1 Update 19 or later version

All versions < V7.5 SP2 Update 6
Update to V7.5 SP2 Update 6 or later version

All versions < V15 SP1 Update 7
Update to V15 SP1 Update 7 or later version

All versions < V16 Update 5
Update to V16 Update 5 or later version

All versions < V17 Update 2
Update to V17 Update 2 or later version

All versions >= V17 Update 2 < V17 Update 4
only affected by CVE-2021-40363
Update to V17 Update 4 or later version
  • CVE-2021-40363: Harden the application's host to prevent local access by untrusted personnel

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 6.3
CWE CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CVSS v3.1 Base Score 5.5
CWE CWE-538: Insertion of Sensitive Information into Externally-Accessible File or Directory

V1.0 (2022-02-08): Publication Date
V1.1 (2022-04-12): Added solution for SIMATIC WinCC V7.4, SIMATIC PCS 7 V8.2 and SIMATIC PCS 7 V9.0
V1.2 (2022-05-10): Added solution for SIMATIC WinCC V15
V1.3 (2022-08-09): Added solution to SIMATIC WinCC V17 (for CVE-2021-40363)