CVE-2021-31966 Explained : Impact and Mitigation

Microsoft SharePoint Server Remote Code Execution Vulnerability was published on June 8, 2021. The vulnerability affects various versions of Microsoft SharePoint Server.

Understanding CVE-2021-31966

This CVE involves a Remote Code Execution impact.

What is CVE-2021-31966?

It is a critical vulnerability in Microsoft SharePoint Server that allows remote attackers to execute arbitrary code.

The Impact of CVE-2021-31966

The impact of this vulnerability is rated as HIGH with a CVSS v3.1 Base Score of 7.2. Attackers can gain full control over affected systems.

Technical Details of CVE-2021-31966

This section includes Vulnerability Description, Affected Systems and Versions, and Exploitation Mechanism.

Vulnerability Description

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

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016 (Version 16.0.0 to 16.0.5173.1000)
Microsoft SharePoint Enterprise Server 2013 SP1 (Version 15.0.0 to 15.0.5353.1000)
Microsoft SharePoint Server 2019 (Version 16.0.0 to 16.0.10375.20000)
Microsoft SharePoint Foundation 2013 SP1 (Version 15.0.0 to 15.0.5353.1000)

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted request to the target system.

Mitigation and Prevention

Protect your systems by following these security measures.

Immediate Steps to Take

Apply the security patch provided by Microsoft immediately.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch your systems to prevent vulnerabilities.
Implement network segmentation and least privilege access.

Patching and Updates

Stay informed about security updates from Microsoft and apply them as soon as they are released.