# CVE-2026-5509: Arbitrary Command Injection via Browser Developer Console in TP-Link Archer BE450 and BE7200

> Authenticated administrators can execute arbitrary system commands on TP-Link Archer routers via the web interface, leading to full device compromise.

- **Severity:** High 8.5 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 May 2026
- **Updated:** 2 Jun 2026
- **Also known as:** GHSA-5qh8-v6gw-rfcc

## What is CVE-2026-5509?

CVE-2026-5509 is a high-severity command injection vulnerability in TP-Link Systems Inc. Archer BE450 v1, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An authenticated command injection vulnerability exists in the Archer BE450 v1 and BE7200 v1 router that allows an administrator to execute arbitrary system commands through the web management interface. After successfully authenticating to the admin interface, an attacker can leverage the browser’s developer console by supplying a crafted input that is passed to backend system commands without adequate sanitization. 

Successful exploitation enables execution of arbitrary commands with elevated privileges on the device, which may allow the attacker to start unauthorized services, modify system configuration, or otherwise fully compromise the router’s operating environment.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-5509?

It affects 2 products.


Products: Tp-Link Archer Be450 Firmware, Tp-Link Archer Be7200 Firmware.

## How do I fix CVE-2026-5509?

No fix has been published for CVE-2026-5509 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5509 being exploited?

There is no known exploitation of CVE-2026-5509 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5509 and fix it if it is affected.

What it is: CVE-2026-5509 is a high-severity command injection vulnerability in TP-Link Systems Inc. Archer BE450 v1, published on 27 May 2026. 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-2026-5509 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Archer BE450 v1. 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-2026-5509/ (Markdown: https://insights.sbomify.com/CVE-2026-5509/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5509
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5509
- OSV: https://osv.dev/vulnerability/CVE-2026-5509

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5509/
Summaries are generated and may contain mistakes; the official description above is the record.