CVE-2026-72895

State: Published
Severity: 8.4 High
Published: Oct 13, 2026
Updated: Oct 14, 2026
Reserved: Aug 10, 2026

Description

A vulnerability has been identified in SIMATIC IPC BX-21A (All versions < V31.01.13), SIMATIC IPC RW-543A (All versions < V1.1.4), SIMATIC IPC227G / IPC277G / IPC277G PRO / IPC327G / IPC377G (All versions < V28.01.15). A BIOS vendor test key is present in the UEFI Secure Boot key database. This could allow a local attacker with physical or administrative access to the device to boot an operating system or UEFI application signed with that test key, bypassing UEFI Secure Boot protections even when Secure Boot is enabled, potentially leading to a full loss of confidentiality, integrity, and availability of the device.

Scores

CVSS	Score	Vector	Source
4.0	8.4 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	siemens
3.1	7.7 High	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H	siemens

Weaknesses

CWE-1394 Use of Default Cryptographic Key

Affected Products

Product	Versions
SIMATIC IPC BX-21ASiemens	before V31.01.13Affected
SIMATIC IPC RW-543ASiemens	before V1.1.4Affected
SIMATIC IPC227G / IPC277G / IPC277G PRO / IPC327G / IPC377GSiemens	before V28.01.15Affected

References

https://cert-portal.siemens.com/productcert/html/ssa-159454.html

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