ICSA-25-289-07: Siemens SIMATIC ET 200SP Communication Processors
CISA advisory · released 2025-10-14
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 1, 2025-10-14 (final)
CISA's summary
Summary: SIMATIC ET 200SP communication processors (CP 1542SP-1, CP 1542SP-1 IRC and CP 1543SP-1, incl. SIPLUS variants) contain an authentication vulnerability that could allow an unauthenticated remote attacker to access the configuration data. Siemens has released new versions for the affected products and recommends to update to the latest versions.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) | vers:intdot/<2.4.24 |
| Siemens | SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) | vers:intdot/<2.4.24 |
| Siemens | SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) | vers:intdot/<2.4.24 |
| Siemens | SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) | vers:intdot/<2.4.24 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) | vers:intdot/<2.4.24 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) | vers:intdot/<2.4.24 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2025-40771 — CVE-2025-40771 · CWE-306
Affected devices do not properly authenticate configuration connections. This could allow an unauthenticated remote attacker to access the configuration data.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability to CISA.
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.
This product uses the NVD API but is not endorsed or certified by the NVD.
CVE records: Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
CISA's Known Exploited Vulnerabilities catalog and CISA Vulnrichment data are CC0 1.0. CISA advisories are shown with the TLP label their document carries. No endorsement by CISA, DHS, NIST or MITRE is stated or implied.