ICSA-21-194-05: Siemens SIMATIC Software Products
CISA advisory · released 2021-07-13
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 2, 2025-05-06 (final)
CISA's summary
Summary: Multiple SIMATIC Software products are affected by a vulnerability that could allow an attacker to manipulate project files and remotely execute code. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC PCS 7 V8.2 and earlier | vers:all/* |
| Siemens | SIMATIC PCS 7 V9.0 | <V9.0_SP3 |
| Siemens | SIMATIC PDM | <V9.2 |
| Siemens | SIMATIC STEP 7 V5.X | <V5.6_SP2_HF3 |
| Siemens | SINAMICS STARTER (containing STEP 7 OEM version) | <V5.4_HF2 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2021-31893 — CVE-2021-31893 · CWE-120
The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.
Acknowledgments, as the advisory lists them
- Uri Katz, Claroty: coordinated disclosure
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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