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Fencer Intel
high 8.2

CVE-2022-21978 json

Microsoft Exchange Server Elevation of Privilege Vulnerability

published 4y ago modified 4mo ago also EUVD-2022-27133

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

Microsoft Exchange Server Elevation of Privilege Vulnerability

Patch / fix

  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.028
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.026
  • Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.36
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.009
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.009

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Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 22
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 11
  • Microsoft Microsoft Exchange Server 2013 Cumulative Update 23
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 12

Classification

Technology feeds

References

Sources

Fencer Intel 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.