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Fencer Vulns
medium 6.5

CVE-2021-24085 json

Microsoft Exchange Server Spoofing Vulnerability

published 2021-02-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11001

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.6%
EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Microsoft Exchange Server Spoofing Vulnerability

Patch / fix

Exploit prediction

4.63% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CNA 3.1 5.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 8
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 19
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 7
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 18

Classification

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.