What is CVE-2026-54800?

CVE-2026-54800 is a medium-severity vulnerability in Siemens Cpci85 Central Processing/communication, classified under Initialization of a Resource with an Insecure Default. CVSS score: 4.8/10. Published 2026-07-09.

How severe is CVE-2026-54800?

Medium severity. CVSS v3 base score is 4.8 out of 10.

RCE in Siemens Cpci85 Central Processing/communication

CVE-2026-54800

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 secu…

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Siemens Cpci85 Central Processing/communication — versions 0
Siemens Sicore Base System — versions 0

Weakness classification (CWE)

CWE-1188 — Initialization of a Resource with an Insecure Default

References

productcert@siemens.com

Frequently asked questions

What is CVE-2026-54800?: CVE-2026-54800 is a medium-severity vulnerability in Siemens Cpci85 Central Processing/communication, classified under Initialization of a Resource with an Insecure Default. CVSS score: 4.8/10. Published 2026-07-09.
How severe is CVE-2026-54800?: Medium severity. CVSS v3 base score is 4.8 out of 10.