CVE-2026-9455
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 has been found in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument FileName leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public 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-2026-9455
EUVD
EUVD-2026-31673
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 UploadOpenVpnCert function of the /cgi-bin/cstecgi.cgi file within the Web Management Interface component.

The issue arises from improper handling of the FileName argument, which allows an attacker to inject operating system commands.

Because this vulnerability can be exploited remotely without any authentication or user interaction, it poses a significant security risk.

Impact Analysis

Exploitation of this vulnerability can lead to remote code execution on the affected device.

An attacker could execute arbitrary commands on the router, potentially gaining full control over the device.

This could result in unauthorized access to network traffic, disruption of network services, or use of the device as a foothold for further attacks.

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