CVE-2021-22726 Explained : Impact and Mitigation

A Server-Side Request Forgery (SSRF) vulnerability, identified as CWE-918, has been found in Schneider Electric's EVlink City, Parking, and Smart Wallbox products. This vulnerability could enable attackers to execute unintended actions or access data by sending malicious parameters to the charging station's web server.

Understanding CVE-2021-22726

This section delves into the specifics of the CVE-2021-22726 vulnerability.

What is CVE-2021-22726?

CVE-2021-22726 is a Server-Side Request Forgery (SSRF) vulnerability present in various Schneider Electric EVlink products, allowing unauthorized access and action execution.

The Impact of CVE-2021-22726

The vulnerability may lead to severe consequences like unauthorized access to sensitive data or unintended control access to the charging station web server.

Technical Details of CVE-2021-22726

Explore the technical aspects of the CVE-2021-22726 vulnerability in this section.

Vulnerability Description

The SSRF vulnerability in EVlink City, Parking, and Smart Wallbox products can be exploited through crafted malicious parameters, posing a serious risk to data security.

Affected Systems and Versions

All versions of EVlink City (EVC1S22P4, EVC1S7P4), EVlink Parking (EVW2, EVF2, EV.2), and EVlink Smart Wallbox (EVB1A) before R8 V3.4.0.1 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by submitting carefully designed malicious parameters to the charging station's web server, potentially leading to unauthorized data access or malicious operations.

Mitigation and Prevention

Learn how to mitigate and prevent the CVE-2021-22726 vulnerability in this section.

Immediate Steps to Take

Immediately update affected products to version R8 V3.4.0.1 or newer to eliminate the SSRF vulnerability and enhance security.

Long-Term Security Practices

Implement strict input validation mechanisms, network segmentation, and regular security assessments to fortify your infrastructure against potential SSRF attacks.

Patching and Updates

Stay informed about security patches released by Schneider Electric and apply updates promptly to safeguard against known vulnerabilities.