CVE-2026-9432

Deferred Deferred - Pending Action

Command Injection in Totolink A8000RU

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 vulnerability affects the function setWiFiAdvancedCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument bgProtection results in os command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

CVSS Scores

EPSS Scores

Probability:
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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-2026-9432

EUVD

EUVD-2026-31637

Affected Vendors & Products

Vendor	Product	Version / Range
totolink	a8000ru	7.1cu.643_b20200521

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

Executive Summary

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

An attacker can manipulate the argument 'bgProtection' to perform OS command injection, which means they can execute arbitrary operating system commands on the device.

The attack can be launched remotely, and an exploit for this vulnerability has already been made public.

Impact Analysis

Because this vulnerability allows remote OS command injection, an attacker could gain unauthorized control over the affected device.

This could lead to severe impacts such as disruption of network services, unauthorized access to sensitive data, or using the device as a foothold to attack other systems.

The high CVSS scores (up to 10.0) indicate a critical severity level, meaning the vulnerability poses a significant security risk.

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