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 ...

Published: Dec 9, 2025Updated: Dec 10, 2025 Sources: CVE List NVD BDU csafCWE-200

4.9MEDIUM

Description

SIMATIC CN 4100 contains multiple vulnerabilities which could potentially lead to a compromise in availability, integrity and confidentiality. Siemens has released a new version for SIMATIC CN 4100 and recommends to update to the latest version.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:HPrivileges Required

High

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-200

Affected Products

Siemens AG

commercial·DEaka siemens

simatic cn 4100 firmware

ICS / OT / IoT

SIMATIC CN 4100

ICS / OT / IoT

and 1 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

https://cert-portal.siemens.com/productcert/csaf/ssa-416652.json

cert-portal.siemens.com

https://cert-portal.siemens.com/productcert/html/ssa-416652.html

cert-portal.siemens.com

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-015-12.json

raw.githubusercontent.com

and 7 more references View all →

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