Microsoft Exchange Server Denial of Service Vulnerability
CVE-2021-34453

7.5HIGH

Key Information:

Vendor: Microsoft
Status: Microsoft Exchange Server 2019 Cumulative Update 11; Microsoft Exchange Server 2019 Cumulative Update 10; Microsoft Exchange Server 2016 Cumulative Update 21; Microsoft Exchange Server 2016 Cumulative Update 22
Vendor: CVE Published:; 13 October 2021

What is CVE-2021-34453?

Microsoft Exchange Server Denial of Service Vulnerability

Microsoft Exchange Server 2016 Cumulative Update 21 x64-based Systems 15.01.0 < 15.01.2308.015

Microsoft Exchange Server 2016 Cumulative Update 22 x64-based Systems 15.0.0 < 15.01.2375.012

Microsoft Exchange Server 2019 Cumulative Update 10 x64-based Systems 15.02.0 < 15.02.0922.014

Score:

7.5

Severity:

HIGH

Confidentiality:

None

Integrity:

None

Availability:

None

Attack Vector:

Network

Attack Complexity:

Low

Privileges Required:

None

User Interaction:

None

Scope:

Unchanged

Download the Critical Vulnerability Management Cheat Sheet

CVE-2021-34453 Data