CVE-2026-9407
Deferred Deferred - Pending Action
Command Injection in Totolink A8000RU Web Interface

Publication date: 2026-05-25

Last updated on: 2026-05-25

Assigner: VulDB

Description
A security vulnerability has been detected in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setFirewallType of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.
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Meta Information
Published
2026-05-25
Last Modified
2026-05-25
Generated
2026-06-15
AI Q&A
2026-05-26
EPSS Evaluated
2026-06-14
NVD
CVE-2026-9407
EUVD
EUVD-2026-31610
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
totolink a8000ru 7.1cu.643_b20200521
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-77 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.
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

This vulnerability exists in the Totolink A8000RU router, specifically in the setFirewallType function of the /cgi-bin/cstecgi.cgi file within the Web Management Interface.

An attacker can manipulate the firewallType argument to perform OS command injection, which means they can execute arbitrary operating system commands on the device.

The attack can be carried out remotely without any authentication, making it highly dangerous.

This vulnerability has been publicly disclosed and exploits are available.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary OS commands on the affected device without authentication.

Successful exploitation can lead to full compromise of the device, including unauthorized access, control over network traffic, and potential use of the device as a foothold for further attacks.

Given the high CVSS scores (up to 10.0 in version 2.0), the impact includes complete confidentiality, integrity, and availability loss of the device.

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