CVE-2025-40940
Medium
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.
SeverityMedium
CVSS4.9
Exploit probability—
ProductSiemens Simatic Cn 4100 Firmware
PublishedDec 9, 2025
First seenDec 9, 2025
Weakness typeCWE-200Sensitive information exposure
How to fix
Update
- siemens simatic_cn_4100_firmware4.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| siemens simatic_cn_4100_firmware | v < 4.0.1 | 4.0.1 |
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