CVE-2025-40940

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://cert-portal.siemens.com/productcert/html/ssa-416652.html	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:*

History

10 Dec 2025, 21:34

Type	Values Removed	Values Added
CPE		cpe:2.3:o:siemens:simatic_cn_4100_firmware:::::::: cpe:2.3:h:siemens:simatic_cn_4100:-:::::::*
References	~~() https://cert-portal.siemens.com/productcert/html/ssa-416652.html -~~	() https://cert-portal.siemens.com/productcert/html/ssa-416652.html - Vendor Advisory
First Time		Siemens Siemens simatic Cn 4100 Firmware Siemens simatic Cn 4100

09 Dec 2025, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-09 16:17

Updated : 2025-12-10 21:34

NVD link : CVE-2025-40940

Mitre link : CVE-2025-40940

CVE.ORG link : CVE-2025-40940

JSON object : View

Products Affected

siemens

simatic_cn_4100
simatic_cn_4100_firmware

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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