# CVE-2019-5426: Auth bypass in EdgeMAX

> Unauthenticated attackers can exploit port forwarding features to access local services or proxy traffic if SSH is enabled.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Apr 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x3jj-59g5-58r2

## What is CVE-2019-5426?

CVE-2019-5426 is a medium-severity authentication bypass vulnerability in Ubiquiti Networks EdgeMAX, published on 10 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Ubiquiti Networks EdgeSwitch X v1.1.0 and prior, an unauthenticated user can use the "local port forwarding" and "dynamic port forwarding" (SOCKS proxy) functionalities. Remote attackers without credentials can exploit this bug to access local services or forward traffic through the device if SSH is enabled in the system settings.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2019-5426?

It affects 1 product.


Products: Ui Edgeswitch X.

## How do I fix CVE-2019-5426?

No fix has been published for CVE-2019-5426 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5426 being exploited?

There is no known exploitation of CVE-2019-5426 in the wild and no public exploit code.

## Other vulnerabilities in Ubiquiti Networks EdgeMAX

- [CVE-2019-5424](https://insights.sbomify.com/CVE-2019-5424/): Command injection in EdgeMAX (high 8.8)
- [CVE-2019-5425](https://insights.sbomify.com/CVE-2019-5425/): Command injection in EdgeMAX (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5426 and fix it if it is affected.

What it is: CVE-2019-5426 is a medium-severity authentication bypass vulnerability in Ubiquiti Networks EdgeMAX, published on 10 Apr 2019. 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-2019-5426 in the wild and no public exploit code.

Affected product: Ubiquiti Networks EdgeMAX. 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-2019-5426/ (Markdown: https://insights.sbomify.com/CVE-2019-5426/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5426
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5426
- OSV: https://osv.dev/vulnerability/CVE-2019-5426

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5426/
Summaries are generated and may contain mistakes; the official description above is the record.