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Fencer Intel
high 8.0

CVE-2021-41348 json

Microsoft Exchange Server Elevation of Privilege Vulnerability

published 5y ago modified 4mo ago also EUVD-2021-28377

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

Microsoft Exchange Server Elevation of Privilege Vulnerability

Patch / fix

  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.015
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0922.014
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.009
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.012

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Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.2 AV:A/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 21
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 10
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 11
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 22

Classification

Weakness
  • CWE-269 Improper Privilege Management
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.