CVE-2021-26854: Microsoft Exchange Server Remote Code Execution Vulnerability

Overview

Severity

Medium (CVSS 6.6)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Mar

Released

2021-03-02

EPSS Score

4.93% (percentile: 89.6%)

Affected Products (5)

Exchange Server

• Microsoft Exchange Server 2016 Cumulative Update 19
• Microsoft Exchange Server 2019 Cumulative Update 8
• Microsoft Exchange Server 2013 Cumulative Update 23
• Microsoft Exchange Server 2019 Cumulative Update 7
• Microsoft Exchange Server 2016 Cumulative Update 18

Security Updates (5)

• 5000871
• 5000871
• 5000871
• 5000871
• 5000871

Acknowledgments

Steven Seeley (mr_me) of Source Incite

Revision History

• 2021-03-02: Information published.