CVE-2025-40743
Siemens · published 2025-08-12
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
A vulnerability has been identified in SINUMERIK 828D PPU.4 (All versions < V4.95 SP5), SINUMERIK 828D PPU.5 (All versions < V5.25 SP1), SINUMERIK 840D sl (All versions < V4.95 SP5), SINUMERIK MC (All versions < V1.25 SP1), SINUMERIK MC V1.15 (All versions < V1.15 SP5), SINUMERIK ONE (All versions < V6.25 SP1), SINUMERIK ONE V6.15 (All versions < V6.15 SP5). 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.
Status at the source
- NVD status: Deferred — NVD has not analysed this CVE.
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SINUMERIK 828D PPU.4 | 0 – before V4.95 SP5: affected |
| Siemens | SINUMERIK 828D PPU.5 | 0 – before V5.25 SP1: affected |
| Siemens | SINUMERIK 840D sl | 0 – before V4.95 SP5: affected |
| Siemens | SINUMERIK MC | 0 – before V1.25 SP1: affected |
| Siemens | SINUMERIK MC V1.15 | 0 – before V1.15 SP5: affected |
| Siemens | SINUMERIK ONE | 0 – before V6.25 SP1: affected |
| Siemens | SINUMERIK ONE V6.15 | 0 – before V6.15 SP5: affected |
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 8.7 HIGH — as published by Siemens AG (Secondary)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1: 8.3 HIGH — as published by Siemens AG (Secondary)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
Source dates: published 2025-08-12, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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