CVE-2021-26855 : What You Need to Know

Microsoft Exchange Server Remote Code Execution Vulnerability was published on March 2, 2021. This CVE affects multiple versions of Microsoft Exchange Server.

Understanding CVE-2021-26855

This vulnerability allows remote code execution on affected Microsoft Exchange Server versions.

What is CVE-2021-26855?

The CVE-2021-26855 is a Remote Code Execution vulnerability in Microsoft Exchange Server, enabling attackers to execute arbitrary code remotely.

The Impact of CVE-2021-26855

With a CVSS base score of 9.1, this vulnerability is considered critical, allowing attackers to take full control of the affected system remotely.

Technical Details of CVE-2021-26855

The vulnerability allows attackers to execute code remotely on the affected versions of Microsoft Exchange Server.

Vulnerability Description

CVE-2021-26855 is a Remote Code Execution vulnerability that can be exploited by attackers to compromise the affected systems.

Affected Systems and Versions

Microsoft Exchange Server 2013, 2016, and 2019 versions are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely without authentication, making it highly dangerous for organizations.

Mitigation and Prevention

It is crucial to take immediate action to protect systems from potential exploitation.

Immediate Steps to Take

Organizations should apply the necessary security updates provided by Microsoft to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly updating systems and implementing security best practices can help prevent such vulnerabilities in the future.

Patching and Updates

Ensure that all Microsoft Exchange Server versions are up to date with the latest security patches to prevent exploitation.