CVE-2026-9477
Deferred Deferred - Pending Action
Command Injection in Totolink A8000RU Router

Publication date: 2026-05-25

Last updated on: 2026-05-25

Assigner: VulDB

Description
A security flaw has been discovered in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument mac results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.
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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-2026-9477
EUVD
EUVD-2026-31710
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
totolink a8000ru 7.1cu.643_b20200521
Helpful Resources
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 security flaw found in the Totolink A8000RU router's web management interface, specifically in the function setAccessDeviceCfg within the /cgi-bin/cstecgi.cgi file.

The flaw allows an attacker to perform OS command injection by manipulating the 'mac' argument remotely, meaning the attacker can execute arbitrary operating system commands on the device without needing any privileges or user interaction.

The exploit for this vulnerability has been publicly released, increasing the risk of attacks.

Impact Analysis

This vulnerability can have severe impacts as it allows remote attackers to execute arbitrary operating system commands on the affected device.

  • Complete compromise of the affected router, including unauthorized access and control.
  • Potential disruption of network services managed by the device.
  • Exposure of sensitive network information or data passing through the device.
  • Use of the compromised device as a foothold for further attacks within the network.
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