CVE-2026-9436
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 flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setL2tpServerCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Executing a manipulation of the argument enable can lead to os command injection. The attack can be executed remotely. The exploit has been published 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-2026-9436
EUVD
EUVD-2026-31644
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 is a flaw found in the Totolink A8000RU router's web management interface, specifically in the function setL2tpServerCfg within the file /cgi-bin/cstecgi.cgi. It occurs when the argument 'enable' is manipulated, which can lead to operating system command injection. This means an attacker can remotely execute arbitrary commands on the device.

Impact Analysis

The vulnerability allows remote attackers to execute arbitrary operating system commands on the affected device without any authentication or user interaction. This can lead to full compromise of the device, including unauthorized access, data theft, disruption of network services, or using the device as a foothold for further attacks.

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