How severe is CVE-2023-40729?

CVE-2023-40729 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2023-40729 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40729?

CVE-2023-40729 affects Siemens Qms Automotive. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40729?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-40729 published?

CVE-2023-40729 was published on 2023-09-12 and last updated on 2026-06-17.

CVE-2023-40729

CVE-2023-40729 is a high-severity vulnerability in Siemens Qms Automotive with a CVSS 3.x base score of 7.3. 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-319.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Siemens Qms Automotive
Published: 2023-09-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in QMS Automotive (All versions < V12.39). The affected application lacks security control to prevent unencrypted communication without HTTPS. An attacker who managed to gain machine-in-the-middle position could manipulate, or steal confidential information.

Frequently asked questions

What is CVE-2023-40729?: A vulnerability has been identified in QMS Automotive (All versions < V12.39). The affected application lacks security control to prevent unencrypted communication without HTTPS. An attacker who managed to gain machine-in-the-middle position could manipulate, or steal confidential information.
How severe is CVE-2023-40729?: CVE-2023-40729 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2023-40729 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40729?: CVE-2023-40729 affects Siemens Qms Automotive. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40729?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-40729 published?: CVE-2023-40729 was published on 2023-09-12 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-147266.pdf

Affected products (1)

cpe:2.3:a:siemens:qms_automotive:*:*:*:*:*:*:*:*

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