# CVE-2026-40425: MacGregor Voyage Data Recorder (VDR) G4e Files or Directories Accessible to External Parties

> An administrator can directly edit sensitive authentication files via the web interface, potentially changing the root password and escalating privileges.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 May 2026
- **Updated:** 29 May 2026
- **Also known as:** GHSA-3cp8-799v-mwxm

## What is CVE-2026-40425?

CVE-2026-40425 is a medium-severity missing authorization vulnerability in Danelec MacGregor Voyage Data Recorder (VDR) G4e, published on 29 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The administrator account for the

Danelec MacGregor Voyage Data Recorder
web interface can directly edit sensitive files related to authentication, potentially changing the root password.

Weakness: CWE-552 (Files or Directories Accessible to External Parties)

## Which versions are affected by CVE-2026-40425?

It affects 1 product.


Products: Macgregor Interschalt Vdr G4e Firmware.

## How do I fix CVE-2026-40425?

No fix has been published for CVE-2026-40425 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-40425 being exploited?

There is no known exploitation of CVE-2026-40425 in the wild and no public exploit code.

## Other vulnerabilities in Danelec MacGregor Voyage Data Recorder (VDR) G4e

- [CVE-2026-42929](https://insights.sbomify.com/CVE-2026-42929/): MacGregor Voyage Data Recorder (VDR) G4e Use of Hard-coded Credentials (high 8.7)
- [CVE-2026-42941](https://insights.sbomify.com/CVE-2026-42941/): MacGregor Voyage Data Recorder (VDR) G4e Use of Default Credentials (high 8.7)
- [CVE-2026-42951](https://insights.sbomify.com/CVE-2026-42951/): MacGregor Voyage Data Recorder (VDR) G4e Insufficiently Protected Credentials (medium 5.9)
- [CVE-2026-44611](https://insights.sbomify.com/CVE-2026-44611/): MacGregor Voyage Data Recorder (VDR) G4e Use of Password Hash With Insufficient Computational Effort (medium 5.9)
- [CVE-2016-9339](https://insights.sbomify.com/CVE-2016-9339/): Path traversal in INTERSCHALT VDR G4e 5.220 and prior (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40425 and fix it if it is affected.

What it is: CVE-2026-40425 is a medium-severity missing authorization vulnerability in Danelec MacGregor Voyage Data Recorder (VDR) G4e, published on 29 May 2026. 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-2026-40425 in the wild and no public exploit code.

Affected product: Danelec MacGregor Voyage Data Recorder (VDR) G4e. 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-2026-40425/ (Markdown: https://insights.sbomify.com/CVE-2026-40425/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40425
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40425
- OSV: https://osv.dev/vulnerability/CVE-2026-40425

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40425/
Summaries are generated and may contain mistakes; the official description above is the record.