CVE-2021-43905 : What You Need to Know

This CVE involves a critical Remote Code Execution vulnerability in the Microsoft Office app.

Understanding CVE-2021-43905

This CVE-2021-43905 affects the Microsoft Office app, potentially allowing Remote Code Execution. The vulnerability was published on December 14, 2021.

What is CVE-2021-43905?

The CVE-2021-43905 is a critical Remote Code Execution vulnerability in the Microsoft Office app, which could allow an attacker to execute arbitrary code on the target system.

The Impact of CVE-2021-43905

The impact of this vulnerability is assessed as critical with a CVSS base score of 9.6, indicating a severe risk to affected systems.

Technical Details of CVE-2021-43905

Vulnerability Description

The vulnerability allows remote attackers to execute arbitrary code on vulnerable systems through the Microsoft Office app.

Affected Systems and Versions

Vendor: Microsoft
Product: Office app
Platforms: Unknown
Versions affected: 0 (published less than the publication date)

Exploitation Mechanism

The exploitation of this vulnerability involves sending a specially crafted file or email to the victim, which, when opened, triggers the execution of malicious code.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Educate users about the risks of opening files or emails from unknown or untrusted sources.
Consider implementing email security measures to filter out potentially malicious content.

Long-Term Security Practices

Regularly update and patch all software to prevent known vulnerabilities from being exploited.
Use endpoint protection solutions to detect and mitigate threats proactively.

Patching and Updates

It is crucial to apply the latest security updates and patches released by Microsoft to mitigate the CVE-2021-43905 vulnerability effectively.