# CVE-2024-8748: Memory corruption in VMG8825-T50K firmware

> A buffer overflow in the packet parser allows attackers to cause a temporary denial of service on the web management interface via crafted HTTP requests.

- **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 Dec 2024
- **Updated:** 3 Dec 2024
- **Also known as:** GHSA-5q23-39rg-fgrp

## What is CVE-2024-8748?

CVE-2024-8748 is a high-severity memory corruption vulnerability in Zyxel VMG8825-T50K firmware, published on 3 Dec 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABOM.8.4)C0 could allow an attacker to cause a temporary denial of service (DoS) condition against the web management interface by sending a crafted HTTP POST request to a vulnerable device.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2024-8748?

It affects 63 products.


Products: Zyxel Ax7501-B0 Firmware, Zyxel Ax7501-B1 Firmware, Zyxel Dx3300-T0 Firmware, Zyxel Dx3300-T1 Firmware, Zyxel Dx3301-T0 Firmware, Zyxel Dx4510-B0 Firmware, Zyxel Dx4510-B1 Firmware, Zyxel Dx5401-B0 Firmware, Zyxel Dx5401-B1 Firmware, Zyxel Ee6510-10 Firmware, Zyxel Emg3525-T50b Firmware, Zyxel Emg5523-T50b Firmware, Zyxel Emg5723-T50k Firmware, Zyxel Emg6726-B10a Firmware, Zyxel Ex2210-T0 Firmware, Zyxel Ex3300-T0 Firmware, Zyxel Ex3300-T1 Firmware, Zyxel Ex3301-T0 Firmware, Zyxel Ex3500-T0 Firmware, Zyxel Ex3501-T0 Firmware and 43 more.

## How do I fix CVE-2024-8748?

No fix has been published for CVE-2024-8748 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-8748 being exploited?

There is no known exploitation of CVE-2024-8748 in the wild and no public exploit code.

## Other vulnerabilities in Zyxel VMG8825-T50K firmware

- [CVE-2025-8693](https://insights.sbomify.com/CVE-2025-8693/): Command injection in DX3300-T0 firmware (high 8.8)
- [CVE-2022-26413](https://insights.sbomify.com/CVE-2022-26413/): Command injection in VMG3312-T20A firmware (high 8.0)
- [CVE-2024-5412](https://insights.sbomify.com/CVE-2024-5412/): Memory corruption in VMG8825-T50K firmware (high 7.5)
- [CVE-2024-12009](https://insights.sbomify.com/CVE-2024-12009/): Command injection in EX5601-T1 firmware (high 7.2)
- [CVE-2024-12010](https://insights.sbomify.com/CVE-2024-12010/): Command injection in AX7501-B1 firmware (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-8748 and fix it if it is affected.

What it is: CVE-2024-8748 is a high-severity memory corruption vulnerability in Zyxel VMG8825-T50K firmware, published on 3 Dec 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-2024-8748 in the wild and no public exploit code.

Affected product: Zyxel VMG8825-T50K 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-2024-8748/ (Markdown: https://insights.sbomify.com/CVE-2024-8748/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-8748
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-8748
- OSV: https://osv.dev/vulnerability/CVE-2024-8748

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-8748/
Summaries are generated and may contain mistakes; the official description above is the record.