CVE-2025-40940 MEDIUM

CVE-2025-40940

Vendor Siemens
Product SIMATIC CN 4100
Weakness CWE-200 · Info exposure
Published December 9, 2025
Last update December 9, 2025
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

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