CVE-2021-26421 Explained : Impact and Mitigation

A spoofing vulnerability identified as CVE-2021-26421 impacting Skype for Business Server 2015 CU11 and Microsoft Lync Server 2013 CU10.

Understanding CVE-2021-26421

This section provides insights into the nature of the vulnerability and its impact.

What is CVE-2021-26421?

The CVE-2021-26421 vulnerability refers to a spoofing issue affecting Skype for Business Server 2015 CU11 and Microsoft Lync Server 2013 CU10.

The Impact of CVE-2021-26421

The vulnerability can potentially allow an attacker to spoof content in the context of the affected applications, posing a risk of misleading users.

Technical Details of CVE-2021-26421

Explore the specific technical aspects of the CVE-2021-26421 vulnerability.

Vulnerability Description

The vulnerability enables a threat actor to carry out spoofing attacks in Skype for Business Server 2015 CU11 and Microsoft Lync Server 2013 CU10 instances.

Affected Systems and Versions

Impacted systems include Skype for Business Server 2015 CU11 with version '2015 CU11' and Lync Server 2013 CU10 with version '8308.0'.

Exploitation Mechanism

The vulnerability can be exploited by threat actors to spoof content within the affected applications, potentially leading to unauthorized disclosure of information.

Mitigation and Prevention

Learn about the steps to mitigate and prevent exploitation of the CVE-2021-26421 vulnerability.

Immediate Steps to Take

It is crucial to apply security patches and updates provided by Microsoft to safeguard against potential spoofing attacks.

Long-Term Security Practices

Implementing robust security protocols and user verification mechanisms can enhance protection against spoofing incidents.

Patching and Updates

Regularly check for security advisories and updates from Microsoft to address vulnerabilities and strengthen overall security posture.