| Publication Date: |
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| Last Update: |
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| Current Version: | V1.0 |
| CVSS v3.1 Base Score: | 10.0 |
| CVSS v4.0 Base Score: | 10.0 |
| Affected Product and Versions | Remediation |
|---|---|
|
All versions < V2604 affected by CVE-2026-56451 |
Update to V2604 or later version
|
Product-specific remediations or mitigations can be found in the section
Known Affected Products.
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: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities.
Affected applications do not properly validate the algorithm specified in the JSON Web Token (JWT) header. This could allow an unauthenticated remote attacker to forge arbitrary JWT, bypass authentication mechanisms and impersonate any user including administrative accounts, potentially gaining full unauthorized access to the application.
| CVSS v3.1 Base Score | 10.0 |
| CVSS v3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| CVSS v4.0 Base Score | 10.0 |
| CVSS v4.0 Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:H/SA:H |
| CWE | CWE-347: Improper Verification of Cryptographic Signature |
| V1.0 (2026-07-14): | Publication Date |