# CVE-2011-4501: Missing authorization in n/a

> Remote attackers can bypass authorization to create arbitrary port mappings on vulnerable routers via UPnP requests, exposing internal services.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Nov 2011
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-w7jg-8v8v-4jpc

## What is CVE-2011-4501?

CVE-2011-4501 is a critical missing authorization vulnerability in n/a, published on 22 Nov 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The UPnP IGD implementation in Edimax EdiLinux on the Edimax BR-6104K with firmware before 3.25, Edimax 6114Wg, Canyon-Tech CN-WF512 with firmware 1.83, Canyon-Tech CN-WF514 with firmware 2.08, Sitecom WL-153 with firmware before 1.39, and Sweex LB000021 with firmware 3.15 allows remote attackers to establish arbitrary port mappings by sending a UPnP AddPortMapping action in a SOAP request to the WAN interface, related to an "external forwarding" vulnerability.

Weakness: CWE-16

## Which versions are affected by CVE-2011-4501?

It affects 12 products.


Products: Canyon-Tech Cn-Wf512, Canyon-Tech Cn-Wf512 Router Firmware, Canyon-Tech Cn-Wf514, Canyon-Tech Cn-Wf514 Router Firmware, Edimax 6114wg, Edimax 6114wg Router Firmware, Edimax Br-6104k, Edimax Br-6104k Router Firmware, Sitecom Wl-153, Sitecom Wl-153 Router Firmware, Sweex Lb000021, Sweex Lb000021 Router Firmware.

## How do I fix CVE-2011-4501?

No fix has been published for CVE-2011-4501 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-4501 being exploited?

There is no known exploitation of CVE-2011-4501 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2011-4502](https://insights.sbomify.com/CVE-2011-4502/): Command injection in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-4501 and fix it if it is affected.

What it is: CVE-2011-4501 is a critical missing authorization vulnerability in n/a, published on 22 Nov 2011. 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-2011-4501 in the wild and no public exploit code.

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-2011-4501/ (Markdown: https://insights.sbomify.com/CVE-2011-4501/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-4501
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-4501
- OSV: https://osv.dev/vulnerability/CVE-2011-4501

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-4501/
Summaries are generated and may contain mistakes; the official description above is the record.