ICSA-20-252-06: Siemens SIMATIC HMI Products (Update A)
CISA advisory · released 2020-09-08
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 5, 2025-05-06 (final)
CISA's summary
Summary: SIMATIC HMI Products are affected by two vulnerabilities that could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack. Siemens has released updates for the affected products and recommends to update to the latest versions. Siemens also suggests following the listed mitigations for the Unified Comfort Panels.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) | <V16 |
| Siemens | SIMATIC HMI Comfort Panels (incl. SIPLUS variants) | <=V16 |
| Siemens | SIMATIC HMI Mobile Panels | <=V16 |
| Siemens | SIMATIC HMI Unified Comfort Panels | <=V16 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2020-15786 — CVE-2020-15786 · CWE-307
Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.
- CVE-2020-15787 — CVE-2020-15787 · CWE-305
Affected devices insufficiently validate authentication attempts as the information given can be truncated to match only a set number of characters versus the whole provided string. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting these vulnerabilities to CISA.
- Joseph Gardiner, Bristol Cyber Security Group - University of Bristol: reporting the vulnerabilities
The advisory's legal notice
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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