CVE-2021-27078

Microsoft Exchange Server Remote Code Execution Vulnerability

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

9.1

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 37.28% Top 5%

Vendor Advisory microsoft.com

Affected: Microsoft Microsoft Exchange Server 2016 Cumulative Update 19

Affected: Microsoft Microsoft Exchange Server 2019 Cumulative Update 8

Affected: Microsoft Microsoft Exchange Server 2013 Cumulative Update 23

Affected: Microsoft Microsoft Exchange Server 2019 Cumulative Update 7

Affected: Microsoft Microsoft Exchange Server 2016 Cumulative Update 18

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27078	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-27078?: CVE-2021-27078 has been scored as a critical severity vulnerability.
How to fix CVE-2021-27078?: To fix CVE-2021-27078, 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-2021-27078 being actively exploited in the wild?: It is possible that CVE-2021-27078 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~37% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27078?: CVE-2021-27078 affects Microsoft Microsoft Exchange Server 2016 Cumulative Update 19, Microsoft Microsoft Exchange Server 2019 Cumulative Update 8, Microsoft Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Microsoft Exchange Server 2019 Cumulative Update 7, Microsoft Microsoft Exchange Server 2016 Cumulative Update 18.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.