How severe is CVE-2023-32737?

CVE-2023-32737 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-32737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-32737?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-32737 have an EU (EUVD) identifier?

Yes. CVE-2023-32737 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-36962.

When was CVE-2023-32737 published?

CVE-2023-32737 was published on 2024-07-09 and last updated on 2026-06-17.

CVE-2023-32737

CVE-2023-32737 is a medium-severity vulnerability with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v4: 7.0
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-36962
Weakness: CWE-502
Published: 2024-07-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-32737?: 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.
How severe is CVE-2023-32737?: CVE-2023-32737 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-32737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-32737?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-32737 have an EU (EUVD) identifier?: Yes. CVE-2023-32737 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-36962.
When was CVE-2023-32737 published?: CVE-2023-32737 was published on 2024-07-09 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-313039.html

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