ICSA-25-191-04: Siemens SIMATIC CN 4100
CISA advisory · released 2025-07-08
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 1, 2025-07-08 (final)
CISA's summary
Summary: A vulnerability in SIMATIC CN 4100 could allow an attacker to cause a denial of service condition. Siemens has released a new version for SIMATIC CN 4100 and recommends to update to the latest version.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC CN 4100 | vers:all/<V4.0 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2025-40593 — CVE-2025-40593 · CWE-20
The affected application allows to control the device by storing arbitrary files in the SFTP folder of the device. This could allow an attacker to cause a denial of service condition.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability to CISA.
- Michael Klassen, Martin Floeck, BASF Security Team: reporting this vulnerability to Siemens
The advisory's legal notice
The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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