High [CVE-2021-34470] Microsoft Exchange Server Elevation of Privilege Vulnerability
This high-severity Microsoft Server advisory covers CVE-2021-34470 affecting Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 21, Microsoft Exchange Server 2019 Cumulative Update 10.
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Summary
Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 21; Microsoft Exchange Server 2019 Cumulative Update 10.
- Microsoft Exchange Server 2013 Cumulative Update 23 15.00.0 before 15.00.1497.023
- Microsoft Exchange Server 2016 Cumulative Update 21 15.01.0 before 15.01.2308.008
- Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0 before 15.02.0922.007
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 15.00.1497.023
- 15.01.2308.008
- 15.02.0922.007
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 15.00.1497.023, 15.01.2308.008, 15.02.0922.007. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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