Publication Date:
Last Update:
Current Version: V1.1
CVSS v3.1 Base Score: 9.8
Affected Product and Versions Remediation

All versions when using the device firmware upgrade mechanism
only affected by CVE-2021-34798

All versions < V1.0.3

All versions < V3.1
only affected by CVE-2021-34798

All versions
  • Restrict access to the affected systems, especially to port 443/tcp, to trusted IP addresses only

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-476: NULL Pointer Dereference
CVSS v3.1 Base Score 9.8
CWE CWE-787: Out-of-bounds Write
CVSS v3.1 Base Score 9.0
CWE CWE-918: Server-Side Request Forgery (SSRF)

V1.0 (2022-06-14): Publication Date
V1.1 (2022-10-11): Added fix for SINEC NMS