# CVE-2018-15700: Denial of service in TP-Link TL-WRN841N

> An unauthenticated LAN user can cause a denial of service on TP-Link routers by sending a crafted HTTP header with an unexpected Referer field.

- **Severity:** Medium 6.5 (`CVSS:3.0/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:** 1 Oct 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-cwh5-c65g-h3xr

## What is CVE-2018-15700?

CVE-2018-15700 is a medium-severity denial of service vulnerability in TP-Link TL-WRN841N, published on 1 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The web interface in TP-Link TL-WRN841N 0.9.1 4.16 v0348.0 is vulnerable to a denial of service when an unauthenticated LAN user sends a crafted HTTP header containing an unexpected Referer field.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-15700?

It affects 1 product.


Products: Tp-Link Tl-Wrn841n Firmware.

## How do I fix CVE-2018-15700?

No fix has been published for CVE-2018-15700 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-15700 being exploited?

There is no known exploitation of CVE-2018-15700 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link TL-WRN841N

- [CVE-2018-15702](https://insights.sbomify.com/CVE-2018-15702/): Cross-site request forgery in TP-Link TL-WRN841N (high 8.8)
- [CVE-2018-15701](https://insights.sbomify.com/CVE-2018-15701/): Denial of service in TP-Link TL-WRN841N (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15700 and fix it if it is affected.

What it is: CVE-2018-15700 is a medium-severity denial of service vulnerability in TP-Link TL-WRN841N, published on 1 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-15700 in the wild and no public exploit code.

Affected product: TP-Link TL-WRN841N. 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-2018-15700/ (Markdown: https://insights.sbomify.com/CVE-2018-15700/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15700
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15700
- OSV: https://osv.dev/vulnerability/CVE-2018-15700

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15700/
Summaries are generated and may contain mistakes; the official description above is the record.