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. This vulnerability affects the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument admpass leads to os command injection. The attack can be executed remotely. The exploit is publicly available and might be used.

CVSS Scores

EPSS Scores

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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-2026-9476

EUVD

EUVD-2026-31709

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's Web Management Interface, specifically in the setPasswordCfg function within the /cgi-bin/cstecgi.cgi file. It involves manipulation of the 'admpass' argument, which leads to operating system command injection. This means an attacker can remotely execute arbitrary commands on the device.

Impact Analysis

The vulnerability allows remote attackers to execute arbitrary OS commands without any authentication or user interaction. This can lead to full compromise of the affected device, including unauthorized access, control over the router, disruption of network services, and potential use of the device as a foothold for further attacks.

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