ICSA-25-226-19: Siemens SINUMERIK
CISA advisory · released 2025-08-12
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 1, 2025-08-12 (final)
CISA's summary
Summary: Siemens SINUMERIK Controllers are affected by an improper VNC password check vulnerability. 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 | SINUMERIK 828D PPU.4 | <V4.95_SP5 |
| Siemens | SINUMERIK 828D PPU.5 | <V5.25_SP1 |
| Siemens | SINUMERIK 840D sl | <V4.95_SP5 |
| Siemens | SINUMERIK MC | <V1.25_SP1 |
| Siemens | SINUMERIK MC V1.15 | <V1.15_SP5 |
| Siemens | SINUMERIK ONE | <V6.25_SP1 |
| Siemens | SINUMERIK ONE V6.15 | <V6.15_SP5 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2025-40743 — CVE-2025-40743 · CWE-288
The affected application improperly validates authentication for its VNC access service, allowing access with insufficient password verification. This could allow an attacker to gain unauthorized remote access and potentially compromise system confidentiality, integrity, or availability.
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.
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