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CVE record · CVE-2021-40368

Buffer overflow in Siemens SIMATIC S7-400 CPU 412-1 DP V7 and others

CVSS 7.5 HighEPSS 0.010 · 63rd percentile

Published by the CVE Program (CNA: siemens) at 12 Apr 2022, 09:07 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 SIMATIC S7-400 CPU 412-1 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 412-2 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 412-2 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIMATIC S7-400 CPU 414-2 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 414-3 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 414-3 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIMATIC S7-400 CPU 414F-3 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIMATIC S7-400 CPU 416-2 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 416-3 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 416-3 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIMATIC S7-400 CPU 416F-2 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 CPU 416F-3 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIMATIC S7-400 CPU 417-4 DP V7
  • affected All versions
Other versions: unknown
Siemens SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)
  • affected All versions < V6.0.10
Other versions: unknown
Siemens SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)
  • affected All versions < V10.1
Other versions: unknown
Siemens SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants)
  • affected All versions < V8.2.3
Other versions: unknown
Siemens SIPLUS S7-400 CPU 414-3 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIPLUS S7-400 CPU 416-3 PN/DP V7
  • affected All versions < V7.0.3
Other versions: unknown
Siemens SIPLUS S7-400 CPU 416-3 V7
  • affected All versions
Other versions: unknown
Siemens SIPLUS S7-400 CPU 417-4 V7
  • affected All versions
Other versions: unknown
Identifiers
CVE-2021-40368
CNA
siemens
Weakness (CWE)
CWE-119
Tags
Published
12 Apr 2022
Updated
21 Apr 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C CNA (siemens)
  • CISA KEV Not listed.
  • EPSS 0.010, the 63rd percentile, on 5 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 Apr 2022. 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.