# CVE-2024-23721: Path traversal in n/a

> An attacker can exploit a directory traversal vulnerability in Draytek Vigor3910 routers to export sensitive information via a crafted POST request.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Mar 2024
- **Updated:** 28 Aug 2024
- **Also known as:** GHSA-h8qq-7cp6-5q6c

## What is CVE-2024-23721?

CVE-2024-23721 is a high-severity path traversal vulnerability in Draytek Vigor3910 Firmware, published on 20 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Directory Traversal issue was discovered in process_post on Draytek Vigor3910 4.3.2.5 devices. When sending a certain POST request, it calls the function and exports information.

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

## Which versions are affected by CVE-2024-23721?

It affects 1 product.


Products: Draytek Vigor3910 Firmware.

## How do I fix CVE-2024-23721?

No fix has been published for CVE-2024-23721 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-23721 being exploited?

There is no known exploitation of CVE-2024-23721 in the wild and no public exploit code.

## Other vulnerabilities in Draytek Vigor3910 Firmware

- [CVE-2024-41589](https://insights.sbomify.com/CVE-2024-41589/): Weak cryptography in n/a (high 8.8)
- [CVE-2024-41586](https://insights.sbomify.com/CVE-2024-41586/): Memory corruption in n/a (high 8.0)
- [CVE-2024-41595](https://insights.sbomify.com/CVE-2024-41595/): Memory corruption in n/a (high 8.0)
- [CVE-2024-46550](https://insights.sbomify.com/CVE-2024-46550/): Memory corruption in n/a (high 7.5)
- [CVE-2024-46551](https://insights.sbomify.com/CVE-2024-46551/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-23721 and fix it if it is affected.

What it is: CVE-2024-23721 is a high-severity path traversal vulnerability in Draytek Vigor3910 Firmware, published on 20 Mar 2024. 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-2024-23721 in the wild and no public exploit code.

Affected product: Draytek Vigor3910 Firmware. 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-2024-23721/ (Markdown: https://insights.sbomify.com/CVE-2024-23721/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-23721
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-23721
- OSV: https://osv.dev/vulnerability/CVE-2024-23721

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-23721/
Summaries are generated and may contain mistakes; the official description above is the record.