ICSA-20-252-02: Siemens SIMATIC S7-300 and S7-400 CPUs (Update C)
CISA advisory · released 2020-09-08
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 4, 2020-12-08 (final)
CISA's summary
Risk evaluation: Successful exploitation of this vulnerability could result in credential disclosure.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SINUMERIK 840D sl | vers:all/* |
| Siemens | SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) | vers:all/* |
| Siemens | SIMATIC S7-400 CPU family (incl. SIPLUS variants) | vers:all/* |
| Siemens | SIMATIC WinAC RTX (F) 2010 | vers:all/* |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2020-15791 · CWE-522
The authentication protocol between a client and a PLC via Port 102/TCP (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.CVE-2020-15791 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).
Acknowledgments, as the advisory lists them
- Hyunguk Yoo, University of New Orleans: reporting these vulnerabilities to Siemens
- Irfan Ahmed, Adeen Ayub, Virginia Commonwealth University: reporting these vulnerabilities to Siemens
- Jongwon Choi, National Security Research Institute: reporting these vulnerabilities to Siemens
- Taeshik Shon, Ajou University: reporting these vulnerabilities to Siemens
The advisory's legal notice
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Sources
DeSpy's copy of this version is dated 2026-09-28.
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