# CVE-2024-30840: Denial of service in n/a

> Attackers can cause a denial of service on Tenda AC15 routers via a stack overflow in the DHCP client function.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Apr 2024
- **Updated:** 15 Aug 2024
- **Also known as:** GHSA-j9hf-h25p-vw62

## What is CVE-2024-30840?

CVE-2024-30840 is a medium-severity denial of service vulnerability in Tenda Ac15 Firmware, published on 15 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A Stack Overflow vulnerability in Tenda AC15 v15.03.05.18 allows attackers to cause a denial of service via the LISTEN parameter in the fromDhcpListClient function.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2024-30840?

It affects 1 product.


Products: Tenda Ac15 Firmware.

## How do I fix CVE-2024-30840?

No fix has been published for CVE-2024-30840 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-30840 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-30840 exists.

## Other vulnerabilities in Tenda Ac15 Firmware

- [CVE-2020-10987](https://insights.sbomify.com/CVE-2020-10987/): Tenda AC1900 Router AC15 Model Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2026-24103](https://insights.sbomify.com/CVE-2026-24103/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-24101](https://insights.sbomify.com/CVE-2026-24101/): Command injection in n/a (critical 9.8)
- [CVE-2026-24105](https://insights.sbomify.com/CVE-2026-24105/): Command injection in n/a (critical 9.8)
- [CVE-2025-63666](https://insights.sbomify.com/CVE-2025-63666/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-30840 and fix it if it is affected.

What it is: CVE-2024-30840 is a medium-severity denial of service vulnerability in Tenda Ac15 Firmware, published on 15 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-30840 exists.

Affected product: Tenda Ac15 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-2024-30840/ (Markdown: https://insights.sbomify.com/CVE-2024-30840/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-30840
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-30840
- OSV: https://osv.dev/vulnerability/CVE-2024-30840

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-30840/
Summaries are generated and may contain mistakes; the official description above is the record.