# CVE-2023-40727: Security feature bypass in QMS Automotive

> Weak application signing in QMS Automotive Mobile allows attackers to tamper with application code, potentially leading to code execution.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Sep 2023
- **Updated:** 27 Feb 2025
- **Also known as:** GHSA-32xp-f3ph-fppf

## What is CVE-2023-40727?

CVE-2023-40727 is a high-severity vulnerability in Siemens QMS Automotive, published on 12 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been identified in QMS Automotive (All versions < V12.39). The QMS.Mobile module of the affected application uses weak outdated application signing mechanism. This could allow an attacker to tamper the application code.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2023-40727?

It affects 1 product.


Products: Siemens Qms Automotive.

## How do I fix CVE-2023-40727?

No fix has been published for CVE-2023-40727 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-40727 being exploited?

There is no known exploitation of CVE-2023-40727 in the wild and no public exploit code.

## Other vulnerabilities in Siemens QMS Automotive

- [CVE-2023-40726](https://insights.sbomify.com/CVE-2023-40726/): Information disclosure in QMS Automotive (high 8.8)
- [CVE-2022-43958](https://insights.sbomify.com/CVE-2022-43958/): Information disclosure in QMS Automotive (high 7.6)
- [CVE-2023-40724](https://insights.sbomify.com/CVE-2023-40724/): Information disclosure in QMS Automotive (high 7.3)
- [CVE-2023-40728](https://insights.sbomify.com/CVE-2023-40728/): Other in QMS Automotive (high 7.3)
- [CVE-2023-40729](https://insights.sbomify.com/CVE-2023-40729/): Information disclosure in QMS Automotive (high 7.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-40727 and fix it if it is affected.

What it is: CVE-2023-40727 is a high-severity vulnerability in Siemens QMS Automotive, published on 12 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-40727 in the wild and no public exploit code.

Affected product: Siemens QMS Automotive. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-40727/ (Markdown: https://insights.sbomify.com/CVE-2023-40727/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-40727
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-40727
- OSV: https://osv.dev/vulnerability/CVE-2023-40727

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-40727/
Summaries are generated and may contain mistakes; the official description above is the record.