CVE-2026-54800 PUBLISHED

Assigner: siemens
Reserved: 16.06.2026 Published: 09.07.2026 Updated: 09.07.2026

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.

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS Score: 4.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

CVSS Vector: 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
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Siemens
Product	CPCI85 Central Processing/Communication
Versions	Default: unknown affected from 0 to V26.20 (excl.)

Vendor	Siemens
Product	SICORE Base system
Versions	Default: unknown affected from 0 to V26.20.0 (excl.)

References

https://cert-portal.siemens.com/productcert/html/ssa-229470.html

Problem Types

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