CVE-2021-40487 : Vulnerability Insights and Analysis

Microsoft SharePoint Server Remote Code Execution Vulnerability was published on October 13, 2021, affecting Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, and Microsoft SharePoint Foundation 2013 Service Pack 1.

Understanding CVE-2021-40487

This CVE describes a Remote Code Execution vulnerability in Microsoft SharePoint Server.

What is CVE-2021-40487?

The CVE-2021-40487 is a Remote Code Execution vulnerability.

The Impact of CVE-2021-40487

This vulnerability has a base severity of HIGH with a CVSS base score of 8.1. It allows an attacker to execute arbitrary code on the target system remotely.

Technical Details of CVE-2021-40487

This section provides technical details of the vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to execute code on the target system.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016 (Version 16.0.0 to less than 16.0.5227.1000)
Microsoft SharePoint Server 2019 (Version 16.0.0 to less than 16.0.10379.20000)
Microsoft SharePoint Foundation 2013 Service Pack 1 (Version 15.0.0 to less than 15.0.5389.1000)

Exploitation Mechanism

The vulnerability can be exploited remotely by an attacker to execute malicious code.

Mitigation and Prevention

Follow the below steps to mitigate and prevent the vulnerability.

Immediate Steps to Take

Apply the patches provided by Microsoft immediately.
Restrict access to the vulnerable systems.
Monitor for any unusual activities on the network.

Long-Term Security Practices

Regularly update and patch the software and systems.
Conduct regular security training for employees.
Implement network segmentation and least privilege access.

Patching and Updates

Ensure to apply the latest patches and updates provided by Microsoft to fix the vulnerability.