CVE-2023-40729

Information interception and manipulation via unencrypted HTTP

Published Sep 12, 2023 · Updated Feb 27, 2025

Cleartext transmission in Siemens IBS QMS Automotive before 12.39 allows man-in-the-middle attackers to read or alter application data. The application's communication path permits HTTP without enforcing HTTPS, leaving confidential traffic unencrypted in transit. Exploitation requires a position on the communication path and user interaction; the reported consequence is limited to confidentiality and integrity.

CVSS severity7.3
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Siemens IBS QMS Automotive before 12.39 allows man-in-the-middle attackers to read or alter application data. The application's communication path permits HTTP without enforcing HTTPS, leaving confidential traffic unencrypted in transit. Exploitation requires a position on the communication path and user interaction; the reported consequence is limited to confidentiality and integrity.

The record

CVE
CVE-2023-40729
Published
Sep 12, 2023
Updated
Feb 27, 2025
Vendor
Siemens
Product
IBS QMS Automotive
Classifications
CWE-319, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions < V12.39

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · IBS QMS Automotiveversion=All versions < V12.39

Published CVSS scores

7.3Siemens AGCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
7.4NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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