CVE-2021-38651

lowpriority · track · 14EPSS 0.013 · 71 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.33% (71st) EPSS

CVSS 3.5 · low

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-27

Microsoft SharePoint Server Spoofing Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft SharePoint Enterprise Server 2016msrc_csaf
5215.1000:Security Update:https://support.microsoft.com/kb/5002020
https://support.microsoft.com/kb/5002020
FixedMicrosoft SharePoint Foundation 2013 Service Pack 1msrc_csaf
5381.1000:Security Update:https://support.microsoft.com/kb/5002024
https://support.microsoft.com/kb/5002024
FixedMicrosoft SharePoint Server 2019msrc_csaf
10378.20002:Security Update:https://support.microsoft.com/kb/5002018
https://support.microsoft.com/kb/5002018

cvss

Technical severity, 0–10. One row per scoring source.

7.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3–7.6

v2.03.5lowAV:N/AC:M/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 6.8 · impact 2.9

v2.03lowAV:N/AC:M/Au:S/C:N/I:P/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.6highAV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.17.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Nsecondary · secure@microsoft.com USexploitability 2.3 · impact 4.7

v3.17.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

v3.17.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · NVD / NIST USexploitability 2.1 · impact 1.4

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-451US

affected products (15)

Products and version ranges known to be affected.

Microsoft Microsoft SharePoint Enterprise Server 201616.0.0 → 5215.1000enisa_euvdEU
Microsoft Microsoft SharePoint Foundation 2013 Service Pack 115.0.0 → 5381.1000enisa_euvdEU
Microsoft Microsoft SharePoint Server 201916.0.0 → 10378.20002enisa_euvdEU
Microsoft Corp Microsoft SharePoint Enterprise Server 2016all versionsfstec_bduRU
Microsoft Corp Microsoft SharePoint Foundation≤ 2013 SP1fstec_bduRU
Microsoft Corp Microsoft SharePoint Server 2019all versionsfstec_bduRU
Microsoft SharePoint Enterprise Server 2016all versionsfixedmsrc_csafUS
Microsoft SharePoint Enterprise Server 2016< 5215.1000msrc_csafUS
Microsoft SharePoint Foundation 2013 Service Pack 1all versionsfixedmsrc_csafUS
Microsoft SharePoint Foundation 2013 Service Pack 1< 5381.1000msrc_csafUS
Microsoft SharePoint Server 2019all versionsfixedmsrc_csafUS
Microsoft SharePoint Server 2019< 10378.20002msrc_csafUS
microsoft sharepoint enterprise server= 2016nvdUScpe:2.3:a:microsoft:sharepoint_enterprise_server:*:*:*:*:*:*:*:*
microsoft sharepoint foundation= 2013nvdUScpe:2.3:a:microsoft:sharepoint_foundation:*:*:*:*:*:*:*:*
microsoft sharepoint server= 2019nvdUScpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2021-38651Microsoft SharePoint Server Spoofing Vulnerability2021-09-14csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu msrc_csaf nvd NVD CVE.org MITRE

published 2021-09-15modified 2026-08-10

references (8)

External citations — patches, advisories, analysis.

scry

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