CVE-2026-9458
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 identified in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument enabled leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might 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-2026-9458
EUVD
EUVD-2026-31678
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 setWanCfg function within the /cgi-bin/cstecgi.cgi file of its Web Management Interface.

The issue arises because manipulation of an argument passed to this function allows an attacker to perform OS command injection.

This means an attacker can remotely execute arbitrary operating system commands on the affected device.

The exploit for this vulnerability is publicly available.

Impact Analysis

An attacker exploiting this vulnerability can remotely execute arbitrary commands on the affected Totolink A8000RU device.

This can lead to full compromise of the device, including unauthorized access, control over network traffic, data theft, or disruption of network services.

Given the high severity scores (CVSS v3.1 score of 9.8 and v2.0 score of 10.0), the impact is critical.

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