ICSA-21-287-04: Siemens SINUMERIK
CISA advisory · released 2021-10-12
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: A Denial-of-Service vulnerability found in SINUMERIK Controllers could allow an unauthenticated attacker with network access to the affected devices to cause system failure with total loss of availability. Siemens has released an update for the SINUMERIK 828D and recommends to update to the latest version. Siemens recommends specific countermeasures for products where updates are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SINUMERIK 808D | vers:all/* |
| Siemens | SINUMERIK 828D | <V4.95 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2021-37199 — CVE-2021-37199 · CWE-122
Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial-of-service in the device.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability to CISA.
- Industrial Control Security Laboratory of Qi An Xin Group Inc.: reporting the vulnerability and coordination efforts
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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