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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0003.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Siemens Subscribe
Simatic Cn 4100 Subscribe
Simatic Cn 4100 Firmware Subscribe

Configuration 1 [-]

AND
cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:*

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Siemens Subscribe
Simatic Cn 4100 Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://cert-portal.siemens.com/productcert/html/ssa-416652.html cve-icon cve-icon
History

Wed, 10 Dec 2025 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Siemens simatic Cn 4100 Firmware
CPEs cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*
Vendors & Products Siemens simatic Cn 4100 Firmware

Wed, 10 Dec 2025 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Siemens
Siemens simatic Cn 4100
Vendors & Products Siemens
Siemens simatic Cn 4100

Tue, 09 Dec 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Tue, 09 Dec 2025 11:00:00 +0000

Type Values Removed Values Added
Description 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.
Weaknesses CWE-200
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: siemens

Published:

Updated: 2025-12-09T15:18:54.927Z

Reserved: 2025-04-16T09:06:15.878Z

Link: CVE-2025-40940

cve-icon Vulnrichment

Updated: 2025-12-09T15:18:30.347Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-09T16:17:47.813

Modified: 2025-12-10T21:34:59.600

Link: CVE-2025-40940

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-10T17:52:20Z

Weaknesses