What’s Vulnerable › Vulnerabilities
CVE-2026-54800
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-09 · updated 2026-10-23
- Weakness: CWE-1188
Description
A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.20), SICORE Base system (All versions < V26.20.0). The affected application ships with a default configuration that disables all OPC UA security mechanisms. This could allow an attacker to gain unauthorized access and control over critical system functions.
Affected products
- Siemens CPCI85 Central Processing/Communication: before V26.20 — fixed in V26.20
- Siemens SICORE Base system: before V26.20.0 — fixed in V26.20.0
How to fix
Upgrade to a fixed version: Siemens CPCI85 Central Processing/Communication V26.20; Siemens SICORE Base system V26.20.0. Check the vendor advisory for mitigations.
References
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