CVE-2025-40938 HIGH

CVE-2025-40938

Vendor Siemens
Product SIMATIC CN 4100
Weakness CWE-798 · Hardcoded credentials
Published December 9, 2025
Last update December 9, 2025
View on NVD All CVEs

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information, potentially impacting the device’s confidentiality, integrity, and availability.

Key dates

02Disclosure timeline

December 9, 2025 CVE published
December 9, 2025 Record updated