CVE-2023-32737

mediumpriority · track · 0EPSS 0.002 · 7 %ileDEEUNLRUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.18% (7th) EPSS
CVSS 6.3 · medium
Is it mine?
6 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

A vulnerability has been identified in SIMATIC STEP 7 Safety V18 (All versions < V18 Update 2). Affected applications do not properly restrict the .NET BinaryFormatter when deserializing user-controllable input. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application. This is the same issue that exists for .NET BinaryFormatter https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2300.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedSIMATIC STEP 7 Safety V18siemens_psirt

    Update to V18 Update 2 or later version

  • FixedSIMATIC STEP 7 Safety V18cisa_csaf_ot

    Update to V18 Update 2 or later version

  • MitigationSIMATIC STEP 7 Safety V18siemens_psirt

    Avoid uploading PLC software from untrusted devices or MMC cards

  • MitigationSIMATIC STEP 7 Safety V18cisa_csaf_ot

    Avoid uploading PLC software from untrusted devices or MMC cards

02

cvss

Technical severity, 0–10. One row per scoring source.

7.0
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4–7

v3.16.3mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:Hsecondary · productcert@siemens.com DEexploitability 0.3 · impact 5.9
v3.16.3mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.16.3mediumAV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.16.3mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US
v4.07highCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/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:Xsecondary · productcert@siemens.com DE
v4.07highCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.04mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-502USCWE-502USCWE-502USCWE-502USCWE-502US
05

affected products (6)

Products and version ranges known to be affected.

06

advisories (4)

Vendor and ecosystem advisories describing this.

  • NCSC-2024-0282Kwetsbaarheden verholpen in Siemens ProductenNL2024-07-09csaf · ncsc_nlNL

    Siemens heeft kwetsbaarheden verholpen in diverse producten als Mendix, RUGGEDOM, SIMATIC, SINEMA, SIPROTEC en de Engineering Platforms voor diverse systemen.

  • SSA-313039SSA-313039: Deserialization Vulnerability in STEP 7 Safety before V192024-07-09csaf · siemens_psirtDE

    Affected applications do not properly restrict the .NET BinaryFormatter when deserializing user-controllable input. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application. Siemens has released a new version for SIMATIC STEP 7 Safety V18 and recommends to update to the latest version.

  • WID-SEC-W-2024-1572Siemens TIA Portal: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2024-07-09csaf · cert_bundDE

    Ein entfernter anonymer oder lokal privilegierter Angreifer kann mehrere Schwachstellen in Siemens TIA Portal ausnutzen, um beliebigen Code auszuführen.

  • ICSA-24-193-12Siemens TIA Portal and SIMATIC STEP 72024-07-09icsa · cisa_csaf_otUS

    Affected applications do not properly restrict the .NET BinaryFormatter when deserializing user-controllable input. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application. Siemens has released a new version for SIMATIC STEP 7 Safety V18 and recommends to update to the latest version.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtncsc_nlcert_bundNVDCVE.orgMITRE
published 2024-07-09modified 2026-06-17
09

references (4)

External citations — patches, advisories, analysis.

scry

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