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Fencer Vulns
high 7.6

CVE-2021-38651 json

Microsoft SharePoint Server Spoofing Vulnerability

published 2021-09-15 5 y ago modified 2026-08-10 2 mo ago also EUVD-2021-25090

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 71%
public exploits
0
none known

Summary

Microsoft SharePoint Server Spoofing Vulnerability

Patch / fix

  • Microsoft Microsoft SharePoint Enterprise Server 2016 5215.1000
  • Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1 5381.1000
  • Microsoft Microsoft SharePoint Server 2019 10378.20002

Exploit prediction

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

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
CNA 3.1 3.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/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 Foundation 2013 Service Pack 1
  • Microsoft Microsoft SharePoint Server 2019

References

Sources

Fencer Vulns 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.