CVE-2022-26206 Explained : Impact and Mitigation

This article provides details about CVE-2022-26206, a command injection vulnerability affecting Totolink routers.

Understanding CVE-2022-26206

CVE-2022-26206 is a security vulnerability found in Totolink A830R, A3100R, A950RG, A800R, A3000RU, and A810R routers that allows attackers to execute arbitrary commands.

What is CVE-2022-26206?

The vulnerability exists in the 'setLanguageCfg' function of the affected Totolink routers, specifically through the 'langType' parameter. This flaw enables malicious actors to run commands of their choice by sending a specially crafted request.

The Impact of CVE-2022-26206

With CVE-2022-26206, threat actors can exploit the vulnerability to gain unauthorized access to the affected routers, compromise network security, and potentially launch further attacks on connected devices.

Technical Details of CVE-2022-26206

Below are the technical details of the CVE-2022-26206 vulnerability:

Vulnerability Description

Totolink routers, including A830R, A3100R, A950RG, A800R, A3000RU, and A810R, are susceptible to command injection via the 'langType' parameter in the 'setLanguageCfg' function.

Affected Systems and Versions

The following Totolink router versions are impacted: A830R V5.9c.4729_B20191112, A3100R V4.1.2cu.5050_B20200504, A950RG V4.1.2cu.5161_B20200903, A800R V4.1.2cu.5137_B20200730, A3000RU V5.9c.5185_B20201128, and A810R V4.1.2cu.5182_B20201026.

Exploitation Mechanism

Exploiting CVE-2022-26206 involves crafting a specific request with malicious commands in the 'langType' parameter, allowing threat actors to execute arbitrary commands on the affected Totolink routers.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-26206, consider the following:

Immediate Steps to Take

Immediately update the firmware of Totolink routers to the latest version provided by the manufacturer.
Restrict network access to the routers and implement strong access controls.

Long-Term Security Practices

Regularly monitor Totolink security advisories and apply patches promptly.
Conduct security assessments to detect vulnerabilities and risks in the network infrastructure.

Patching and Updates

Regularly check for firmware updates from Totolink and apply them as soon as they are released to ensure protection against known vulnerabilities.