CVE-2025-40938
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-10

Assigner: Siemens AG

Description
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.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-10
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40938
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
siemens simatic_cn_4100 *
siemens simatic_cn_4100_firmware to 4.0.1 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-798 The product contains hard-coded credentials, such as a password or cryptographic key.
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Executive Summary

This vulnerability affects the SIMATIC CN 4100 device (all versions before V4.0.1) where sensitive information is stored in the firmware. An attacker could exploit this to access and misuse that sensitive information, potentially compromising the device's confidentiality, integrity, and availability.

Impact Analysis

The vulnerability could allow an attacker to access sensitive information stored in the device's firmware, which may lead to misuse of that information. This can impact the confidentiality, integrity, and availability of the device, potentially disrupting its normal operation and exposing sensitive data.

Mitigation Strategies

To mitigate this vulnerability, update the SIMATIC CN 4100 device to version V4.0.1 or later. Additionally, protect network access to the devices and follow Siemens' operational guidelines for Industrial Security. [1]

Compliance Impact

The vulnerability in SIMATIC CN 4100 allows unauthorized access to sensitive information stored in the firmware, potentially compromising confidentiality, integrity, and availability of data. This could negatively impact compliance with standards and regulations such as GDPR and HIPAA, which require protection of sensitive data and maintaining data integrity and availability. However, specific compliance impacts or guidance are not detailed in the provided resources.

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