CVE-2021-26630 : What You Need to Know

A vulnerability (CVE-2021-26630) has been identified in HANDY Groupware's ActiveX module, allowing attackers to download or execute arbitrary files by exploiting improper input validation.

Understanding CVE-2021-26630

This vulnerability impacts HANDY Groupware, a product by Handysoft Co., Ltd., on Windows platforms.

What is CVE-2021-26630?

An improper input validation flaw in HANDY Groupware's ActiveX module enables attackers to download or execute malicious files through a vulnerable function.

The Impact of CVE-2021-26630

The vulnerability has a CVSS base score of 7.8 (High severity) with a high impact on confidentiality, integrity, and availability. Attackers can exploit it locally without any required privileges but with user interaction.

Technical Details of CVE-2021-26630

The vulnerability affects multiple versions of HANDY Groupware on Windows systems.

Vulnerability Description

Attackers can leverage this flaw to download or execute files using the parameter value of the vulnerable function.

Affected Systems and Versions

HANDY Groupware <= 1.7.4.6
HANDY Groupware <= 2.0.3.6
HANDY Groupware <= 4.0.1.7

Exploitation Mechanism

The vulnerability can be exploited by manipulating the file download or execution path within the software.

Mitigation and Prevention

To address CVE-2021-26630, immediate mitigation steps and long-term security practices need to be implemented.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Restrict ActiveX controls in browsers or disable them if not required.
Monitor for any unauthorized file downloads or executions.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Educate users and IT staff on secure practices and potential threats.
Implement network segmentation and access controls to restrict unauthorized access.

Patching and Updates

Ensure continuous monitoring for security advisories and updates from Handysoft Co., Ltd.