# CVE-2018-17440: File upload in n/a

> Remote attackers can upload malicious PHP files via an FTP server with hardcoded credentials to execute arbitrary code on D-Link Central WiFi Manager devices.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 8 Oct 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-m8v4-m34m-jgj6

## What is CVE-2018-17440?

CVE-2018-17440 is a critical vulnerability in n/a, published on 8 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on D-Link Central WiFi Manager before v 1.03r0100-Beta1. They expose an FTP server that serves by default on port 9000 and has hardcoded credentials (admin, admin). Taking advantage of this, a remote unauthenticated attacker could execute arbitrary PHP code by uploading any file in the web root directory and then accessing it via a request.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2018-17440?

It affects 1 product.


Products: Dlink Central Wifimanager.

## How do I fix CVE-2018-17440?

No fix has been published for CVE-2018-17440 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17440 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-17440 exists.

Public exploit code:

- D-Link Central WiFiManager Software Controller 1.03 - Multiple Vulnerabilities (exploitdb)
- D-Link Central WiFiManager Software Controller 1.03 - Multiple Vulnerabilities (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2019-13372](https://insights.sbomify.com/CVE-2019-13372/): Code injection in n/a (critical 9.8)
- [CVE-2019-13373](https://insights.sbomify.com/CVE-2019-13373/): SQL injection in n/a (critical 9.8)
- [CVE-2019-13375](https://insights.sbomify.com/CVE-2019-13375/): SQL injection in n/a (critical 9.8)
- [CVE-2018-17442](https://insights.sbomify.com/CVE-2018-17442/): File upload in n/a (high 8.8)
- [CVE-2018-15517](https://insights.sbomify.com/CVE-2018-15517/): Server-side request forgery in n/a (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17440 and fix it if it is affected.

What it is: CVE-2018-17440 is a critical vulnerability in n/a, published on 8 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-17440 exists.

Affected product: n/a. 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-2018-17440/ (Markdown: https://insights.sbomify.com/CVE-2018-17440/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17440
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17440
- OSV: https://osv.dev/vulnerability/CVE-2018-17440

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-17440/
Summaries are generated and may contain mistakes; the official description above is the record.