CVE-2026-9435
Deferred Deferred - Pending Action

Command Injection in Totolink A8000RU

Publication date: 2026-05-25

Last updated on: 2026-05-25

Assigner: VulDB

Description
A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setQosCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument enable results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used.

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Meta Information

Published
2026-05-25
Last Modified
2026-05-25
Generated
2026-07-06
AI Q&A
2026-05-26
EPSS Evaluated
2026-07-04
NVD
CVE-2026-9435
EUVD
EUVD-2026-31643

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-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.
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.

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Executive Summary

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

An attacker can manipulate the 'enable' argument in this function to perform an OS command injection, allowing them to execute arbitrary commands on the device remotely.

The vulnerability can be exploited remotely without any authentication, and a public exploit is available.

Impact Analysis

Exploitation of this vulnerability can lead to full compromise of the affected device.

  • Remote attackers can execute arbitrary operating system commands on the router.
  • This can result in unauthorized control over the device, potentially allowing attackers to intercept, modify, or disrupt network traffic.
  • It may also be used as a foothold to launch further attacks within the network.

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