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TP-Link Archer CVE-2026-5509

| EUVD-2026-32611 HIGH
Improper Input Validation (CWE-20)
2026-05-27 f23511db-6c3e-4e32-a477-6aa17d310630 GHSA-5qh8-v6gw-rfcc
8.5
CVSS 4.0
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CVSS VectorNVD

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
May 27, 2026 - 19:54 vuln.today
Patch available
May 27, 2026 - 19:46 EUVD

DescriptionNVD

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.

AnalysisAI

Authenticated command injection in TP-Link Archer BE450 v1 and BE7200 v1 routers lets an admin-level user run arbitrary OS commands with elevated privileges via the web management interface. The flaw stems from improper input validation (CWE-20): crafted input supplied through the management UI is passed to backend system commands without adequate sanitization, enabling full device compromise. …

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RemediationAI

Within 24 hours: Identify and document all TP-Link Archer BE450 v1 and BE7200 v1 devices; restrict admin access to necessary personnel only and enforce additional authentication controls. Within 7 days: Obtain vendor patch and apply to non-production test routers to validate stability. …

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CVE-2026-5509 vulnerability details – vuln.today

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