CVE-2021-42296 Explained : Impact and Mitigation
Learn about CVE-2021-42296, a critical remote code execution vulnerability in Microsoft Word impacting Microsoft 365 Apps for Enterprise and Microsoft Office LTSC 2021. Find mitigation steps here.
A remote code execution vulnerability in Microsoft Word affecting specific versions of Microsoft 365 Apps for Enterprise and Microsoft Office LTSC 2021.
Understanding CVE-2021-42296
This CVE identifies a critical risk associated with remote code execution on vulnerable systems.
What is CVE-2021-42296?
The Microsoft Word Remote Code Execution Vulnerability (CVE-2021-42296) allows attackers to execute arbitrary code on the target system, potentially leading to system compromise.
The Impact of CVE-2021-42296
The impact of this vulnerability is rated as HIGH, with a CVSS base score of 7.8. Attackers can exploit this flaw to gain unauthorized access, manipulate data, and install malware.
Technical Details of CVE-2021-42296
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability enables remote attackers to execute malicious code with the same privileges as the current user by enticing them to open a specially crafted file.
Affected Systems and Versions
- Microsoft 365 Apps for Enterprise version 16.0.1 on 32-bit and x64-based systems.
- Microsoft Office LTSC 2021 version 16.0.1 on x64-based and 32-bit systems.
Exploitation Mechanism
Attackers can exploit this vulnerability by tricking a user into opening a malicious document, leveraging the vulnerability to execute arbitrary code.
Mitigation and Prevention
Protect systems from CVE-2021-42296 using the following strategies.
Immediate Steps to Take
- Immediately apply the security patch provided by Microsoft to address the vulnerability.
- Educate users on recognizing and avoiding suspicious documents to prevent exploitation.
Long-Term Security Practices
- Regularly update and patch all software to protect against known vulnerabilities.
- Implement email and web filtering to block malicious documents and links.
- Conduct security awareness training to educate users on cybersecurity best practices.
Patching and Updates
Ensure all affected systems are updated with the latest security releases from Microsoft to mitigate the risk of exploitation.