Siemens PSS(R)SINCAL

Publisher excerpt From CISA Cybersecurity Advisories

View CSAF Summary PSS(R)SINCAL uses WibuKey third-party product that contains an out-of-bounds write vulnerability. An attacker could exploit this vulnerability to cause a system crash, resulting in a denial-of-service condition. This affects PSS SINCAL only when configured to use the legacy WibuKey dongle license type. Siemens is actively preparing updates and recommends applicable mitigations for products where patches are currently unavailable. The following versions of Siemens PSS(R)SINCAL are affected: PSS(R)SINCAL V21.5 vers:all/* (CVE-2026-84854) PSS(R)SINCAL V22.0 vers:all/* (CVE-2026-84854) PSS(R)SINCAL V22.5 vers:intdot/<22.5.5 (CVE-2026-84854) CVSS Vendor Equipment v3 7 Siemens PSS(R)SINCAL V21.5 1 Vulnerability Out-of-bounds Write Background Critical Infrastructure Sectors: Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities CVE-2026-84854 In the WibuKey driver, insufficient validation of user input when calculating the size of a kernel buffer could cause small amounts of data to be written outside the intended kernel buffer. This can lead to a system crash. Under unfavorable circumstances, adjacent kernel memory may be modified. Read More 3 Affected Products PSS(R)SINCAL V21.5 Product Status: known_affected Remediations Mitigation Install WIBU Systems WibuKey Ru…

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