CVE-2026-54799

Firmware Signature Validation Bypass Leading to Persistent Code Execution

Published Jul 9, 2026 CVSS 4.0 · 8.4 High 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 contains a vulnerability in its firmware update mechanism's signature validation process. This could allow an attacker to install malicious firmware, leading to persistent code execution and system compromise.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Title Firmware Signature Validation Bypass Leading to Persistent Code Execution
Type Values Removed Values Added
Title Malicious Firmware Bypass in Siemens CPCI85 and SICORE Base System
Type Values Removed Values Added
Title Malicious Firmware Bypass in Siemens CPCI85 and SICORE Base System
Type Values Removed Values Added
Title Malicious Firmware Installation via Bypassed Signature Validation in Siemens CPCI85 and SICORE Devices
Type Values Removed Values Added
Title Malicious Firmware Installation via Bypassed Signature Validation in Siemens CPCI85 and SICORE Devices
Type Values Removed Values Added
Title Firmware Update Signature Validation Failure Leading to Persistent Code Execution
Type Values Removed Values Added
Title Firmware Update Signature Validation Failure Leading to Persistent Code Execution
Type Values Removed Values Added
Title Firmware Signature Validation Exploit in Siemens CPCI85 and SICORE Base Systems
Type Values Removed Values Added
Title Firmware Signature Validation Exploit in Siemens CPCI85 and SICORE Base Systems
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
Metrics ssvc

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

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 contains a vulnerability in its firmware update mechanism's signature validation process. This could allow an attacker to install malicious firmware, leading to persistent code execution and system compromise.
Weaknesses CWE-489
References
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
siemens
Published
Updated
Jul 9, 2026, 2:46 PM
Reserved
Jun 16, 2026, 7:47 AM
Status
Awaiting Analysis
Published
Jul 9, 2026, 3:16 PM
Modified
Oct 24, 2026, 1:10 PM