Siemens Opcenter X

p a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-202-03.json" strong View CSAF /strong /a /p h2 Summary /h2 p strong Opcenter X before V2604 contain an authentication bypass vulnerability that could allow an attacker to gain full unauthorized access to the application. Siemens has released a new version for Opcenter X and recommends to update to the latest version. /strong /p p The following versions of Siemens Opcenter X are affected: /p ul li Opcenter X vers:intdot/ lt;2604 /li /ul div class="csaf-table" table class="tablesaw tablesaw-stack" data-tablesaw-mode="stack" data-tablesaw-minimap thead tr th role="columnheader" data-tablesaw-priority="persist" CVSS /th th role="columnheader" Vendor /th th role="columnheader" Equipment /th th role="columnheader" Vulnerabilities /th /tr /thead tbody tr td v3 10 /td td Siemens /td td Siemens Opcenter X /td td Improper Verification of Cryptographic Signature /td /tr /tbody /table /div h3 Background /h3 ul li strong Critical Infrastructure Sectors: /strong Critical Manufacturing /li li strong Countries/Areas Deployed: /strong Worldwide /li li strong Company Headquarters Location: /strong Germany /li /ul hr h2 Vulnerabilities /h2 div class="csaf-accordion" p a class="csaf-accordion-toggle-all" href="#" Expand All + /a /p div class="csaf-accordion-item" h3 a class="csaf-accordion-toggle" href="#" CVE-2026-56451 /a /h3 div class="csaf-accordion-content" p 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. /p p a href="https://www.cve.org/CVERecord?id=CVE-2026-56451" View CVE Details /a /p hr h4 Affected Products /h4 h5 Siemens Opcenter X /h5 div class="ics-vendor-version-status" div class="ics-vendor" strong Vendor: /strong br Siemens /div div class="ics-version" strong Product Version: /strong br Opcenter X lt; V2604 /div div class="ics-status" strong Product Status: /strong br known_affected /div /div div class="ics-remediations" h6 Remediations /h6 p strong Vendor fix /strong br Update to V2604 or later version br a href="https://support.sw.siemens.com/product/206159703/" https://support.sw.siemens.com/product/206159703/ /a /p /div p strong Relevant CWE: /strong a href="https://cwe.mitre.org/data/definitions/347.html" CWE-347 Improper Verification of Cryptographic Signature /a /p hr h4 Metrics /h4 div class="csaf-table csaf-metrics-table" table class="tablesaw tablesaw-stack" data-tablesaw-mode="stack" data-tablesaw-minimap thead tr th role="columnheader" data-tablesaw-priority="persist" CVSS Version /th th role="columnheader" Base Score /th th role="columnheader" Base Severity /th th role="columnheader" Vector String /th /tr /thead tbody tr td 3.1 /td td 10 /td td CRITICAL /td td a