CVE-2021-31206

Microsoft Exchange Server Remote Code Execution Vulnerability

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

7.6

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 6.55% Top 10%

Vendor Advisory microsoft.com

Affected: Microsoft Microsoft Exchange Server 2019 Cumulative Update 9

Affected: Microsoft Microsoft Exchange Server 2016 Cumulative Update 20

Affected: Microsoft Microsoft Exchange Server 2013 Cumulative Update 23

Affected: Microsoft Microsoft Exchange Server 2016 Cumulative Update 21

Affected: Microsoft Microsoft Exchange Server 2019 Cumulative Update 10

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206	patch vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-826/	vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-31206?: CVE-2021-31206 has been scored as a high severity vulnerability.
How to fix CVE-2021-31206?: To fix CVE-2021-31206, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-31206 being actively exploited in the wild?: It is possible that CVE-2021-31206 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-31206?: CVE-2021-31206 affects Microsoft Microsoft Exchange Server 2019 Cumulative Update 9, Microsoft Microsoft Exchange Server 2016 Cumulative Update 20, Microsoft Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Microsoft Exchange Server 2016 Cumulative Update 21, Microsoft Microsoft Exchange Server 2019 Cumulative Update 10.

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