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CVE record · CVE-2025-40743

Authentication bypass in Siemens SINUMERIK 828D PPU.4 and others

CVSS 8.7 HighEPSS 0.0026 · 18th percentile

Published by the CVE Program (CNA: siemens) at 12 Aug 2025, 11:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Siemens SINUMERIK 828D PPU.4
  • affected before V4.95 SP5 custom
Other versions: unknown
Siemens SINUMERIK 828D PPU.5
  • affected before V5.25 SP1 custom
Other versions: unknown
Siemens SINUMERIK 840D sl
  • affected before V4.95 SP5 custom
Other versions: unknown
Siemens SINUMERIK MC
  • affected before V1.25 SP1 custom
Other versions: unknown
Siemens SINUMERIK MC V1.15
  • affected before V1.15 SP5 custom
Other versions: unknown
Siemens SINUMERIK ONE
  • affected before V6.25 SP1 custom
Other versions: unknown
Siemens SINUMERIK ONE V6.15
  • affected before V6.15 SP5 custom
Other versions: unknown
Identifiers
CVE-2025-40743
CNA
siemens
Weakness (CWE)
CWE-288
Tags
Published
12 Aug 2025
Updated
13 Aug 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.3 High 3.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L CNA (siemens)
8.7 High 4.0 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 CNA (siemens)Used for this record
  • CISA KEV Not listed.
  • EPSS 0.0026, the 18th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 Aug 2025. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.