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CVE record · CVE-2023-32735

Deserialization of untrusted data in Siemens SIMATIC STEP 7 Safety V16 and others

CVSS 7.0 HighEPSS 0.0021 · 11th percentile

Published by the CVE Program (CNA: siemens) at 9 Jul 2024, 12:04 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 STEP 7 Safety V16
  • affected before V16 Update 7 custom
Other versions: unknown
Siemens SIMATIC STEP 7 Safety V17
  • affected before V17 Update 7 custom
Other versions: unknown
Siemens SIMATIC STEP 7 Safety V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens SIMATIC STEP 7 V16
  • affected before V16 Update 7 custom
Other versions: unknown
Siemens SIMATIC STEP 7 V17
  • affected before V17 Update 7 custom
Other versions: unknown
Siemens SIMATIC STEP 7 V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens SIMATIC WinCC Unified V16
  • affected before V16 Update 7 custom
Other versions: unknown
Siemens SIMATIC WinCC Unified V17
  • affected before V17 Update 7 custom
Other versions: unknown
Siemens SIMATIC WinCC Unified V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens SIMATIC WinCC V16
  • affected before V16.7 custom
Other versions: unknown
Siemens SIMATIC WinCC V17
  • affected before V17.7 custom
Other versions: unknown
Siemens SIMATIC WinCC V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens SIMOCODE ES V16
  • affected before V16 Update 7 custom
Other versions: unknown
Siemens SIMOCODE ES V17
  • affected before V17 Update 7 custom
Other versions: unknown
Siemens SIMOCODE ES V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens SIMOTION SCOUT TIA V5.4 SP1
  • affected before * custom
Other versions: unknown
Siemens SIMOTION SCOUT TIA V5.4 SP3
  • affected before * custom
Other versions: unknown
Siemens SIMOTION SCOUT TIA V5.5 SP1
  • affected before * custom
Other versions: unknown
Siemens SINAMICS Startdrive V16
  • affected before * custom
Other versions: unknown
Siemens SINAMICS Startdrive V17
  • affected before * custom
Other versions: unknown
Siemens SINAMICS Startdrive V18
  • affected before * custom
Other versions: unknown
Siemens SIRIUS Safety ES V17
  • affected before V17 Update 7 custom
Other versions: unknown
Siemens SIRIUS Safety ES V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens SIRIUS Soft Starter ES V17
  • affected before V17 Update 7 custom
Other versions: unknown
Siemens SIRIUS Soft Starter ES V18
  • affected before V18 Update 2 custom
Other versions: unknown
Siemens Soft Starter ES V16
  • affected before V16 Update 7 custom
Other versions: unknown
Siemens TIA Portal Cloud V3.0
  • affected before V18 Update 2 custom
Other versions: unknown
Identifiers
CVE-2023-32735
CNA
siemens
Weakness (CWE)
CWE-502
Tags
Published
9 Jul 2024
Updated
27 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
6.5 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C CNA (siemens)
7.0 High 4.0 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (siemens)Used for this record
  • CISA KEV Not listed.
  • EPSS 0.0021, the 11th 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 9 Jul 2024. 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.