CVE-2025-40938
High
Description
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information, potentially impacting the device’s confidentiality, integrity, and availability.
SeverityHigh
CVSS8.1
Exploit probability—
ProductSiemens Simatic Cn 4100 Firmware
PublishedDec 9, 2025
First seenDec 9, 2025
Weakness typeCWE-798Hard-coded credentials
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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