CVE-2021-36940 : What You Need to Know

Microsoft SharePoint Server Spoofing Vulnerability was published on August 12, 2021, with a base severity rating of HIGH.

Understanding CVE-2021-36940

This CVE refers to a Spoofing Vulnerability in Microsoft SharePoint Server, impacting various versions of the software.

What is CVE-2021-36940?

CVE-2021-36940 is a Spoofing Vulnerability that affects Microsoft SharePoint Server. Spoofing allows an attacker to impersonate a user or device on a network.

The Impact of CVE-2021-36940

With a base severity rating of HIGH (CVSS score: 7.6), this vulnerability could lead to unauthorized access, data manipulation, and other security breaches within affected systems.

Technical Details of CVE-2021-36940

Microsoft SharePoint Server versions 2016, 2013 SP1, and 2019 are affected by this Spoofing Vulnerability.

Vulnerability Description

The vulnerability allows attackers to spoof user identities, potentially leading to unauthorized actions within the SharePoint Server environment.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016 version 16.0.0 to less than 16.0.5200.1000
Microsoft SharePoint Enterprise Server 2013 Service Pack 1 version 15.0.0 to less than 15.0.5371.1000
Microsoft SharePoint Server 2019 version 16.0.0 to less than 16.0.10377.20000

Exploitation Mechanism

Exploiting this vulnerability allows attackers to deceive a system or user into believing they are interacting with a trusted entity, leading to potential security compromises.

Mitigation and Prevention

Implementing immediate security measures and applying necessary patches are critical to safeguarding systems from CVE-2021-36940.

Immediate Steps to Take

Monitor security advisories and updates from Microsoft.
Apply the latest security patches provided by Microsoft for the affected versions of SharePoint Server.

Long-Term Security Practices

Regularly update and patch SharePoint Server installations.
Conduct security assessments and audits to detect and mitigate vulnerabilities.

Patching and Updates

Stay informed about security updates and follow best practices to ensure the ongoing protection of SharePoint Server against potential spoofing attacks.