CVE-2021-26596 Explained : Impact and Mitigation

A malicious user can exploit a vulnerability in Nokia NetAct 18A, allowing them to upload a file with JavaScript code that gets executed by a victim's web browser via a manipulated filename parameter.

Understanding CVE-2021-26596

This CVE describes a security flaw in Nokia NetAct 18A that enables a specific attack vector through file uploads.

What is CVE-2021-26596?

The vulnerability in Nokia NetAct 18A permits a threat actor to insert malicious JavaScript code by altering the filename of an uploaded file. This code is subsequently stored and executed by the target's web browser, typically transmitted through a URL parameter.

The Impact of CVE-2021-26596

The exploitation of this vulnerability can lead to unauthorized code execution within a victim's browser environment, potentially resulting in various security risks and data breaches.

Technical Details of CVE-2021-26596

The technical aspects of this CVE cover vulnerability description, affected systems and versions, and the mechanism of exploitation.

Vulnerability Description

The flaw allows an adversary to manipulate file names during uploads, enabling them to inject and execute JavaScript code on the victim's browser.

Affected Systems and Versions

Nokia NetAct 18A is confirmed to be impacted by this security vulnerability, with specific details about affected versions not provided.

Exploitation Mechanism

The primary method of attack involves altering the filename parameter of an uploaded file, which contains the malicious JavaScript code intended for execution on the victim's browser.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-26596, immediate actions and long-term security measures are essential.

Immediate Steps to Take

Users should refrain from uploading files with suspicious filenames and exercise caution when interacting with unfamiliar URLs to prevent potential exploitations.

Long-Term Security Practices

Implementing strict file upload validation mechanisms and conducting regular security audits can help detect and prevent similar vulnerabilities in the future.

Patching and Updates

Organizations using Nokia NetAct 18A are advised to apply relevant security patches and updates provided by the vendor to address the identified vulnerability.