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Servers and applications

CVE-2021-1730

<p>A spoofing vulnerability exists in Microsoft Exchange Server which could result in an attack that would allow a malicious actor to impersonate the user.</p> <p>This update addresses this vulnerability.</p> <p>To prevent these types of attacks, Microsoft recommends customers to download inline images from different DNSdomains than the rest of OWA. Please see further instructions in the FAQ to…

Severity
Medium 5.4
Published
25 Feb 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_18
  • Version 2019-cumulative_update_7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-1730
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-1730