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

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-27 · updated 2026-10-26
Weakness: CWE-20

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.

Affected products

TP-Link Archer Be450 Firmware: before 1.3.0 — fixed in 1.3.0
TP-Link Archer Be7200 Firmware: before 1.3.0 — fixed in 1.3.0

How to fix

Upgrade to a fixed version: TP-Link Archer Be450 Firmware 1.3.0; TP-Link Archer Be7200 Firmware 1.3.0. Check the vendor advisory for mitigations.

References

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