CVE-2021-34470

Microsoft Exchange Server Elevation of Privilege Vulnerability

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

8.0

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 4.98% Top 15%

Vendor Advisory microsoft.com

Affected: Microsoft Microsoft Exchange Server 2013 Cumulative Update 23

Affected: Microsoft Microsoft Exchange Server 2019 Cumulative Update 10

Affected: Microsoft Microsoft Exchange Server 2016 Cumulative Update 21

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34470	patch vendor advisory
http://packetstormsecurity.com/files/163706/Microsoft-Exchange-AD-Schema-Misconfiguration-Privilege-Escalation.html	vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-34470?: CVE-2021-34470 has been scored as a high severity vulnerability.
How to fix CVE-2021-34470?: To fix CVE-2021-34470, 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-2021-34470 being actively exploited in the wild?: It is possible that CVE-2021-34470 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-34470?: CVE-2021-34470 affects Microsoft Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Microsoft Exchange Server 2019 Cumulative Update 10, Microsoft Microsoft Exchange Server 2016 Cumulative Update 21.

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