How severe is CVE-2022-21837?

High severity. CVSS v3 base score is 8.3 out of 10.

Is CVE-2022-21837 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Microsoft Sharepoint Enterprise Server 2016

CVE-2022-21837

Microsoft SharePoint Server Remote Code Execution Vulnerability

Published 2022-01-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.030 (87.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000

Affected products

Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
Microsoft Sharepoint Foundation 2013 Service Pack 1 — versions 15.0.0
Microsoft Sharepoint Server 2019 — versions 16.0.0
Microsoft Sharepoint Server Subscription Edition — versions 16.0.0
Microsoft Sharepoint Foundation — versions 2013
Microsoft Sharepoint Server — versions 2016, 2019

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21837 (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2022-21837?: CVE-2022-21837 is a high-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016. CVSS score: 8.3/10. Published 2022-01-11.
How severe is CVE-2022-21837?: High severity. CVSS v3 base score is 8.3 out of 10.
Is CVE-2022-21837 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.