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TI-2023-16003 Aliases CVE-2023-32737GHSA-v9r2-vfw5-q6j9

Deserialization of untrusted data in Siemens SIMATIC STEP 7 Safety V18

Priority LOW 32CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00178 7th percentileScored 2026-11-07
Fix Fixed SIMATIC STEP 7 Safety V18 (Siemens): V18 Update 2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensSIMATIC STEP 7 Safety V18before V18 Update 2V18 Update 2Patch availableCNA
  • SIMATIC STEP 7 Safety V18 VendorSiemens Affected before V18 Update 2 Fixed in V18 Update 2 Patch available CNA

CPE names CISA-ADP · 1

CPEVersionsRoleVendor
cpe:2.3:a:siemens:simatic_step_7:*:*:*:*:*:*:*:*——Siemens
  • cpe:2.3:a:siemens:simatic_step_7:*:*:*:*:*:*:*:* Versions — — ·Siemens

Remediation

  • Fix · CNA SIMATIC STEP 7 Safety V18 (Siemens) Fixed in V18 Update 2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Siemens SIMATIC STEP 7 Safety V18 V18 Update 2

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2023-16001 Deserialization of untrusted data in Siemens SIMATIC STEP 7 Safety V16Priority LOW 32
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-32737
  2. 2026-10-03 Alias added: GHSA-v9r2-vfw5-q6j9

References

Other 1

  • TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
See all 2487 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences