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Fencer Intel
medium 6.5

CVE-2021-41350 json

Microsoft Exchange Server Spoofing Vulnerability

published 5y ago modified 4mo ago also EUVD-2021-28379

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

Microsoft Exchange Server Spoofing 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

Is CVE-2021-41350 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2y ago

Exploit prediction

1.91% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

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

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.