# CVE-2024-41338: Null dereference in n/a

> Attackers can cause a Denial of Service on Draytek routers via a crafted DHCP request due to a NULL pointer dereference.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Feb 2025
- **Updated:** 5 Jul 2026
- **Also known as:** GHSA-22qr-hr3v-pmr2

## What is CVE-2024-41338?

CVE-2024-41338 is a high-severity vulnerability in Draytek Vigor3910 Firmware, published on 27 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A NULL pointer dereference in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior to v3.9.7, Vigor 2862/2926 prior to v3.9.9.4, Vigor 2133/2762/2832 prior to v3.9.8, Vigor 2135/2765/2766 prior to v4.4.5.1, Vigor 2865/2866/2927 prior to v4.4.5.3, Vigor 2962/3910 prior to v4.3.2.7, Vigor 3912 prior to v4.3.5.2, and Vigor 2925 up to v3.9.6 allows attackers to cause a Denial of Service (DoS) via a crafted DHCP request.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2024-41338?

It affects 20 products.


Products: Draytek Vigor165 Firmware, Draytek Vigor166 Firmware, Draytek Vigor2133 Firmware, Draytek Vigor2135 Firmware, Draytek Vigor2620 Firmware, Draytek Vigor2762 Firmware, Draytek Vigor2765 Firmware, Draytek Vigor2766 Firmware, Draytek Vigor2832 Firmware, Draytek Vigor2860 Firmware, Draytek Vigor2862 Firmware, Draytek Vigor2865 Firmware, Draytek Vigor2866 Firmware, Draytek Vigor2925 Firmware, Draytek Vigor2926 Firmware, Draytek Vigor2927 Firmware, Draytek Vigor2962 Firmware, Draytek Vigor3910 Firmware, Draytek Vigor3912 Firmware, Draytek Vigorlte200 Firmware.

## How do I fix CVE-2024-41338?

No fix has been published for CVE-2024-41338 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-41338 being exploited?

There is no known exploitation of CVE-2024-41338 in the wild and no public exploit code.

## Other vulnerabilities in Draytek Vigor3910 Firmware

- [CVE-2024-41334](https://insights.sbomify.com/CVE-2024-41334/): Security feature bypass in n/a (high 8.8)
- [CVE-2024-41339](https://insights.sbomify.com/CVE-2024-41339/): File upload in n/a (high 8.8)
- [CVE-2024-41340](https://insights.sbomify.com/CVE-2024-41340/): File upload in n/a (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-41338 and fix it if it is affected.

What it is: CVE-2024-41338 is a high-severity vulnerability in Draytek Vigor3910 Firmware, published on 27 Feb 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-2024-41338 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-2024-41338/ (Markdown: https://insights.sbomify.com/CVE-2024-41338/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-41338
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-41338
- OSV: https://osv.dev/vulnerability/CVE-2024-41338

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-41338/
Summaries are generated and may contain mistakes; the official description above is the record.