Advisoriesby IbisSiemensCVE-2026-54800
Siemens CPCI85 Central Processing/Communication: insecure default
Fix: upgrade to V26.20 or later (2 fixed versions below)
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| CPCI85 Central Processing/Communication Product | < V26.20 | V26.20 |
| SICORE Base system Product | < V26.20.0 | V26.20.0 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-1188