CVE-2026-9457
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 determined in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.
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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-2026-9457
EUVD
EUVD-2026-31677
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's Web Management Interface, specifically in the UploadFirmwareFile function of the /cgi-bin/cstecgi.cgi file. It allows an attacker to manipulate the FileName argument to perform an operating system command injection. This means that an attacker can remotely execute arbitrary commands on the device.

Impact Analysis

The vulnerability can have severe impacts because it allows remote attackers to execute arbitrary 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 service, or using the device as a foothold for further attacks.

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