CVE-2021-31181

mediumpriority · attend · 46EPSS 0.290 · 98 %ileexploit · weaponizedEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · weaponized

Likely / severe?

29.0% (98th) EPSS

CVSS 6.5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Microsoft SharePoint Remote Code Execution Vulnerability

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.2–8.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v2.06.2mediumAV:N/AC:L/Au:S/C:P/I:P/A:P/E:Fsecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.9

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94USCWE-94US

exploits (1)

Public proof-of-concept and weaponised exploit code.

exploit/windows/http/sharepoint_unsafe_controlMicrosoft SharePoint Unsafe Control and ViewState RCEweaponized · metasploit

affected products (9)

Products and version ranges known to be affected.

Microsoft Microsoft SharePoint Enterprise Server 201616.0.0 → 16.0.5161.1000enisa_euvdEU
Microsoft Microsoft SharePoint Foundation 2013 Service Pack 115.0.0 → 15.0.5345.1000enisa_euvdEU
Microsoft Microsoft SharePoint Server 201916.0.0 → 16.0.10374.20000enisa_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= 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:*:*:*:*:*:*:*:*

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-05-11modified 2026-06-17

references (13)

External citations — patches, advisories, analysis.

scry

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