Status: UPDATED | Advisory ID: CVE-2026-56451
| CVE | CVE-2026-56451 |
| CVSS Score / Version | 10.0 (Critical) / CVSS v3.1 |
| Updated | 2026-07-15 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | Siemens Opcenter X |
| Classified as | CWE-347 (Improper Verification of Cryptographic Signature) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Siemens | Opcenter X |
| Subsystems | General OT |
| Sectors | Multiple |
A vulnerability has been identified in Opcenter X (All versions < V2604). 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. (NVD)
Monitor Siemens's web page for any future patch releases.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-56451 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-56451 |