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Fencer Intel
high 7.6

CVE-2021-43242 json

Microsoft SharePoint Server Spoofing Vulnerability

published 4y ago modified 4mo ago also EUVD-2021-30186

cvss
7.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

Microsoft SharePoint Server Spoofing Vulnerability

Patch / fix

  • Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.5254.1000
  • Microsoft Microsoft SharePoint Server 2019 16.0.10381.20001
  • Microsoft Microsoft SharePoint Server Subscription Edition 16.0.14326.20620
  • Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5407.1000

Is CVE-2021-43242 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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Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C
CNA 3.1 7.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
NVD 3.1 5.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • Microsoft Microsoft SharePoint Enterprise Server 2016
  • Microsoft Microsoft SharePoint Server 2019
  • Microsoft Microsoft SharePoint Server Subscription Edition
  • Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1

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.