CyberSecBulletin
CVE-2026-5509NVD status: Modified

Archer BE7200 V1: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2026-5509 is a high-severity improper neutralization of special elements used in a command vulnerability in Archer BE7200 V1 from TP-Link, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 1.3.0 Build 20260416 as the first without the flaw, so updating Archer BE7200 V1 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.46% chance of exploitation within 30 days, higher than 85% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Archer BE7200 V1 to 1.3.0 Build 20260416 or a later version.
  2. Update Archer BE450 v1 to 1.3.0 Build 20260416 or a later version.
  3. Update Archer Be450 Firmware to 1.3.0 or a later version.
  4. Read the advisory on tp-link.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
TP-LinkArcher BE7200 V1before 1.3.0 Build 202604161.3.0 Build 20260416
TP-LinkArcher BE450 v1before 1.3.0 Build 202604161.3.0 Build 20260416
TP-LinkArcher Be450 Firmwarebefore 1.3.01.3.0
TP-LinkArcher Be7200 Firmwarebefore 1.3.01.3.0

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
HighAdministrator-level access is required first.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.08.5HighCNA
CVSS 3.17.2HighNVD

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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • If possible, ensure that all external commands called from the program are statically created.
  • Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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