CVE-2021-31196

Microsoft Exchange Server Remote Code Execution Vulnerability

CVE-2021-31196 is fixed in 5 products on 1 platform, first by KB5004778, released July 13, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on August 21, 2024. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

7.2

Important

Exploitation

Exploited

Listed by CISA

CISA KEV

Aug 21, 2024

Federal due date Sep 11, 2024

EPSS

0.5406

99th percentile

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft Exchange Server 2013 Cumulative Update 23	KB5004778	Jul 13, 2021
Microsoft Exchange Server 2016 Cumulative Update 20	KB5004779	Jul 13, 2021
Microsoft Exchange Server 2016 Cumulative Update 21	KB5004779	Jul 13, 2021
Microsoft Exchange Server 2019 Cumulative Update 10	KB5004780	Jul 13, 2021
Microsoft Exchange Server 2019 Cumulative Update 9	KB5004780	Jul 13, 2021

Details

Published
July 13, 2021
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31196

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