CVE-2021-26618 : Security Advisory and Response

A vulnerability has been identified in ToWord of ToOffice, known as the Tmax ToOffice arbitrary file creation vulnerability. Remote attackers can exploit this flaw to execute malicious code by creating arbitrary files on the affected system.

Understanding CVE-2021-26618

This section provides insights into the nature of the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-26618?

The CVE-2021-26618, also known as the Tmax ToOffice arbitrary file creation vulnerability, stems from improper input validation in ToWord of ToOffice. This security flaw enables attackers to create arbitrary files, facilitating the execution of malicious code.

The Impact of CVE-2021-26618

The impact of CVE-2021-26618 is rated as high, with a CVSS base severity score of 7.1. Attackers can exploit this vulnerability to compromise the confidentiality and integrity of the affected system without requiring special privileges. User interaction is required for successful exploitation, highlighting the potential dangers associated with this flaw.

Technical Details of CVE-2021-26618

Let's delve deeper into the specifics of CVE-2021-26618 to better understand its implications, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability arises from an improper input validation issue within ToWord of ToOffice, leading to arbitrary file creation. This weakness can be leveraged by remote attackers to inject and execute arbitrary files containing malicious code on the target system.

Affected Systems and Versions

ToOffice versions up to and including 3.15.5 on the Windows platform are impacted by CVE-2021-26618. Users with these versions are at risk of exploitation by threat actors aiming to compromise system security through file creation and code execution.

Exploitation Mechanism

Attackers can exploit this vulnerability locally by interacting with the system without requiring specific privileges. Through ToWord in ToOffice, they can create arbitrary files embedded with malicious code, which, upon execution, can lead to unauthorized access and system compromise.

Mitigation and Prevention

To safeguard your systems from potential threats associated with CVE-2021-26618, it's essential to implement immediate and long-term security measures, including patching and updates.

Immediate Steps to Take

Users are advised to apply patches released by TmaxSoft Co., Ltd promptly. Additionally, exercise caution while interacting with untrusted files or documents within ToOffice to prevent malicious code execution.

Long-Term Security Practices

In the long term, organizations should prioritize regular security assessments, employee training on cybersecurity best practices, and the adoption of robust security solutions to fortify their defenses against similar vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from TmaxSoft Co., Ltd. Ensure timely installation of patches and updates to address known vulnerabilities and enhance the overall security posture of your systems.