CVE-2021-20857 : Vulnerability Insights and Analysis

A Cross-site scripting vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.

Understanding CVE-2021-20857

This CVE pertains to a specific issue affecting ELECOM LAN router devices, potentially allowing an attacker to execute malicious scripts remotely.

What is CVE-2021-20857?

The CVE-2021-20857 vulnerability involves Cross-site scripting (XSS) in ELECOM LAN routers, enabling authenticated remote attackers to inject arbitrary scripts via unknown methods.

The Impact of CVE-2021-20857

Exploitation of this vulnerability could lead to unauthorized script execution on affected devices, potentially compromising data and user security.

Technical Details of CVE-2021-20857

In-depth technical information related to the CVE includes:

Vulnerability Description

The vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows remote authenticated attackers to inject arbitrary scripts, potentially leading to XSS attacks.

Affected Systems and Versions

The issue affects ELECOM LAN router devices running firmware version 1.20 and earlier, exposing them to the risk of script injection.

Exploitation Mechanism

Attackers with remote authenticated access can exploit unspecified vectors to inject malicious scripts, taking advantage of the XSS vulnerability.

Mitigation and Prevention

Taking immediate action to address CVE-2021-20857 is crucial to maintaining system security. Consider the following steps:

Immediate Steps to Take

Update affected ELECOM LAN routers to the latest firmware version.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement regular security audits to identify and address vulnerabilities promptly.
Educate users on safe browsing practices to mitigate the risk of XSS attacks.

Patching and Updates

Stay informed about security patches and updates provided by ELECOM CO.,LTD. for their LAN routers to ensure protection against known vulnerabilities.