CVE-2026-56451
Critical
Description
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.
SeverityCritical
CVSS10.0
Exploit probability—
ProductOpcenter X
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-347CWE-347
How to fix
Update
- Siemens Opcenter XV2604 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Siemens Opcenter X | v < V2604 | V2604 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.