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CISA Known Exploited Vulnerabilities

Microsoft Exchange Server Information Disclosure Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV
2024-08-21
Remediation due
2024-09-11

Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA notes
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-31196; https://nvd.nist.gov/vuln/detail/CVE-2021-31196

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Severity

CVSS 3.1 · CNA7.2 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC · CISA-ADP
Exploitationactive
Automatableyes
Technical impacttotal

Affected Products

VendorProductAffected versions
MicrosoftMicrosoft Exchange Server 2013 Cumulative Update 23
15.00.0 to <15.00.1497.023
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 20
15.01.0 to <15.01.2242.012
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 21
15.01.0 to <15.01.2308.014
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 10
15.02.0 to <15.02.0922.013
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 9
15.02.0 to <15.02.0858.015

References

2 Links

Record Details

Published
2021-07-14
Last updated
2026-08-10
Assigner (CNA)
microsoft
Credited to
-

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.