# CVE-2024-42058: Null dereference in ATP series firmware

> Unauthenticated attackers can cause denial of service on Zyxel firewalls by sending crafted packets that trigger 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:** 3 Sep 2024
- **Updated:** 3 Sep 2024
- **Also known as:** GHSA-2cmp-5j27-vpm7

## What is CVE-2024-42058?

CVE-2024-42058 is a high-severity vulnerability in Zyxel ATP series firmware, published on 3 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V5.20 through V5.38, and USG20(W)-VPN series firmware versions from V5.20 through V5.38 could allow an unauthenticated attacker to cause DoS conditions by sending crafted packets to a vulnerable device.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2024-42058?

It affects 1 product.


Products: Zyxel Zld.

## How do I fix CVE-2024-42058?

No fix has been published for CVE-2024-42058 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-42058 being exploited?

There is no known exploitation of CVE-2024-42058 in the wild and no public exploit code.

## Other vulnerabilities in Zyxel ATP series firmware

- [CVE-2024-11667](https://insights.sbomify.com/CVE-2024-11667/): Zyxel Multiple Firewalls Path Traversal (high 7.5, exploited in the wild)
- [CVE-2025-9133](https://insights.sbomify.com/CVE-2025-9133/): Missing authorization in ATP series firmware (high 8.1)
- [CVE-2024-42057](https://insights.sbomify.com/CVE-2024-42057/): Command injection in ATP series firmware (high 8.1)
- [CVE-2023-4398](https://insights.sbomify.com/CVE-2023-4398/): Integer overflow in ATP series firmware (high 7.5)
- [CVE-2025-8078](https://insights.sbomify.com/CVE-2025-8078/): Command injection in ATP series firmware (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-42058 and fix it if it is affected.

What it is: CVE-2024-42058 is a high-severity vulnerability in Zyxel ATP series firmware, published on 3 Sep 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-2024-42058 in the wild and no public exploit code.

Affected product: Zyxel ATP series 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-2024-42058/ (Markdown: https://insights.sbomify.com/CVE-2024-42058/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-42058
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-42058
- OSV: https://osv.dev/vulnerability/CVE-2024-42058

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-42058/
Summaries are generated and may contain mistakes; the official description above is the record.