Publication Date:
Last Update:
Current Version: V1.0
CVSS v3.1 Base Score: 7.8
Affected Product and Versions Remediation

All versions < V2.85.44

All versions < V2.85.43
  • Set individual passwords for the main accounts provided in the ACC firmware (SIEMENS, OPERATOR)
  • Disable telnet access

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 affected products with appropriate mechanisms. It is advised to follow recommended security practices in order to run the devices in a protected IT environment.

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 7.8
CWE CWE-20: Improper Input Validation

  • Airbus Security for reporting the vulnerability

The fix for CVE-2022-31808 is part of the ACC platform firmware version V4.1.10. The firmware V2.85.43 (released for ACC-AP) includes platform version V4.1.10. The firmware V2.85.44 (released for ACC-G2) includes platform version V4.1.12.

The new versions are released for both SiPass integrated version lines:

Note that CVE-202-31808 also affects the following products, which are out of support already. Therefore, no fix release is planned for:

  • SiPass integrated AC5100 (ACC)
  • SiPass integrated AC5200 (ACC-Lite, ACC-4, ACC-8, ACC-16, ACC-32)
  • SiPass integrated Granta-MK3 (ACC-GRANTA)

V1.0 (2023-02-14): Publication Date