vulnerability Siemens Opcenter X Siemens Opcenter X versions prior to V2604 contain a critical authentication bypass vulnerability, allowing an unauthenticated attacker to gain full unauthorized access to the application. Siemens has released a new version and recommends immediate updates. This affects critical manufacturing operations worldwide. CISA Advisories · Jul 21, 2026 Critical CVE-2026-56451DEauthenticationjwtcwe-347