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Servers and applications

CVE-2021-34453

Microsoft Exchange Server Denial of Service Vulnerability

Severity
High 7.5
Published
13 Oct 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server
  • Version 2016-cumulative_update_21
  • Version 2016-cumulative_update_22
  • Version 2019-cumulative_update_10
  • Version 2019-cumulative_update_11

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-34453
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-34453