CVE-2026-54800

Published Jul 9, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title OPC UA Security Disabled in Siemens CPCI85 and SICORE Base Systems
Type Values Removed Values Added
Title OPC UA Security Disabled in Siemens CPCI85 and SICORE Base Systems
Type Values Removed Values Added
Title Disabled OPC UA Security Allows Unauthorized Access to Siemens CPCI85 and SICORE Base System
Type Values Removed Values Added
Title Disabled OPC UA Security Allows Unauthorized Access to Siemens CPCI85 and SICORE Base System
Type Values Removed Values Added
Title Unauthorized Access via Disabled OPC UA Security in Siemens CPCI85 and SICORE Systems
Type Values Removed Values Added
Title Unauthorized Access via Disabled OPC UA Security in Siemens CPCI85 and SICORE Systems
Type Values Removed Values Added
Title Unsecured OPC UA Default Configuration in Siemens CPCI85 and SICORE Systems
Type Values Removed Values Added
Title Unsecured OPC UA Default Configuration in Siemens CPCI85 and SICORE Systems
Type Values Removed Values Added
Title OPC UA Security Disabled Enables Unauthorized Access in Siemens CPCI85 and SICORE
Type Values Removed Values Added
Title OPC UA Security Disabled Enables Unauthorized Access in Siemens CPCI85 and SICORE
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Siemens
Siemens cpci85 Central Processing\/communication
Siemens sicore Base System
Vendors & Products Siemens
Siemens cpci85 Central Processing\/communication
Siemens sicore Base System
Type Values Removed Values Added
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.
Weaknesses CWE-1188
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
siemens
Published
Updated
Jul 9, 2026, 2:45 PM
Reserved
Jun 16, 2026, 7:47 AM
Status
Awaiting Analysis
Published
Jul 9, 2026, 3:16 PM
Modified
Oct 23, 2026, 11:10 PM