CVE-2022-26211 Explained : Impact and Mitigation

Totolink A830R, A3100R, A950RG, A800R, A3000RU, and A810R routers were found to have a command injection vulnerability, allowing attackers to run arbitrary commands through crafted requests.

Understanding CVE-2022-26211

This CVE refers to a command injection vulnerability found in multiple Totolink router models, potentially enabling remote attackers to execute arbitrary commands on affected devices.

What is CVE-2022-26211?

The vulnerability exists in the affected Totolink routers due to improper handling of input parameters, specifically in the function CloudACMunualUpdate. By exploiting this flaw, malicious actors can manipulate deviceMac and deviceName parameters to execute unauthorized commands via a specially crafted request.

The Impact of CVE-2022-26211

This security issue poses a significant risk to the confidentiality, integrity, and availability of the affected routers. Attackers could exploit this vulnerability to gain unauthorized access, disrupt services, or perform harmful actions on the network.

Technical Details of CVE-2022-26211

The technical specifics of CVE-2022-26211 include:

Vulnerability Description

The vulnerability allows threat actors to inject and execute arbitrary commands on Totolink routers by tampering with specific input parameters in the CloudACMunualUpdate function.

Affected Systems and Versions

The following Totolink router models and 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
A810R V4.1.2cu.5182_B20201026

Exploitation Mechanism

By sending specially crafted requests containing manipulated deviceMac and deviceName parameters to the affected routers, threat actors can execute arbitrary commands, leading to unauthorized access and potential compromise of the device.

Mitigation and Prevention

To address CVE-2022-26211 and enhance the security of Totolink routers, consider the following measures:

Immediate Steps to Take

Apply security patches provided by Totolink promptly.
Monitor network traffic for any suspicious activity.
Restrict access to vulnerable devices.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Implement network segmentation to isolate critical devices.
Conduct security audits and penetration testing regularly.

Patching and Updates

Stay informed about security updates and advisories from Totolink. Apply patches as soon as they are released to mitigate the risk of exploitation.