# CVE-2025-66262: Arbitrary File Overwrite via Tar Extraction Path Traversal

> Attackers can overwrite arbitrary system files via path traversal in tar extraction, leading to full system compromise on Mozart FM Transmitters.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/AU:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Nov 2025
- **Updated:** 26 Nov 2025
- **Also known as:** GHSA-qffr-32xx-42rc

## What is CVE-2025-66262?

CVE-2025-66262 is a critical path traversal vulnerability in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter, published on 26 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Arbitrary File Overwrite via Tar Extraction Path Traversal in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Tar extraction with -C / allow arbitrary file overwrite via crafted archive.
The `restore_mozzi_memories.sh` script extracts user-controlled tar archives with `-C /` flag, depositing contents to the filesystem root without path validation. When combined with the unauthenticated file upload vulnerabilities (CVE-01, CVE-06, CVE-07), attackers can craft malicious .tgz archives containing path-traversed filenames (e.g., `etc/shadow`, `var/www/index.php`) to overwrite critical system files in writable directories, achieving full system compromise.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2025-66262?

It affects 22 products.


Products: Dbbroadcast Mozart Dds Next 1000 Firmware, Dbbroadcast Mozart Dds Next 100 Firmware, Dbbroadcast Mozart Dds Next 2000 Firmware, Dbbroadcast Mozart Dds Next 3000 Firmware, Dbbroadcast Mozart Dds Next 300 Firmware, Dbbroadcast Mozart Dds Next 30 Firmware, Dbbroadcast Mozart Dds Next 3500 Firmware, Dbbroadcast Mozart Dds Next 500 Firmware, Dbbroadcast Mozart Dds Next 50 Firmware, Dbbroadcast Mozart Dds Next 6000 Firmware, Dbbroadcast Mozart Dds Next 7000 Firmware, Dbbroadcast Mozart Next 1000 Firmware, Dbbroadcast Mozart Next 100 Firmware, Dbbroadcast Mozart Next 2000 Firmware, Dbbroadcast Mozart Next 3000 Firmware, Dbbroadcast Mozart Next 300 Firmware, Dbbroadcast Mozart Next 30 Firmware, Dbbroadcast Mozart Next 3500 Firmware, Dbbroadcast Mozart Next 500 Firmware, Dbbroadcast Mozart Next 50 Firmware and 2 more.

## How do I fix CVE-2025-66262?

No fix has been published for CVE-2025-66262 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-66262 being exploited?

There is no known exploitation of CVE-2025-66262 in the wild and no public exploit code.

## Other vulnerabilities in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter

- [CVE-2025-66253](https://insights.sbomify.com/CVE-2025-66253/): Unauthenticated OS Command Injection (start_upgrade.php) (critical 9.9)
- [CVE-2025-66255](https://insights.sbomify.com/CVE-2025-66255/): Unauthenticated Arbitrary File Upload (upgrade_contents.php) (critical 9.9)
- [CVE-2025-66256](https://insights.sbomify.com/CVE-2025-66256/): Unauthenticated Arbitrary File Upload (patch_contents.php) (critical 9.9)
- [CVE-2025-66261](https://insights.sbomify.com/CVE-2025-66261/): Unauthenticated OS Command Injection (restore_settings.php) (critical 9.9)
- [CVE-2025-63228](https://insights.sbomify.com/CVE-2025-63228/): File upload in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-66262 and fix it if it is affected.

What it is: CVE-2025-66262 is a critical path traversal vulnerability in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter, published on 26 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-66262 in the wild and no public exploit code.

Affected product: DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter. 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-2025-66262/ (Markdown: https://insights.sbomify.com/CVE-2025-66262/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-66262
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-66262
- OSV: https://osv.dev/vulnerability/CVE-2025-66262

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-66262/
Summaries are generated and may contain mistakes; the official description above is the record.