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Fencer Intel
high 8.8

CVE-2021-28482 in the critical feed json

Microsoft Exchange Server Remote Code Execution Vulnerability

published 5y ago modified 4mo ago also EUVD-2021-15160

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
83.2%
EPSS 83.2% chance of exploitation in 30 days, percentile 99.6%
public exploits
0
none known

Summary

Microsoft Exchange Server Remote Code Execution Vulnerability

Patch / fix

  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 9 15.02.0858.010
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 20 15.01.2242.008
  • Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.015
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 19 15.01.2176.012
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 8 15.02.0792.013

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Exploit prediction

83.21% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 9
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 20
  • Microsoft Microsoft Exchange Server 2013 Cumulative Update 23
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 19
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 8

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.