How severe is CVE-2021-1707?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Sharepoint Enterprise Server 2016

CVE-2021-1707

Microsoft SharePoint Server Remote Code Execution Vulnerability

Published 2021-01-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.036 (89.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000

Affected products

Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
Microsoft Sharepoint Foundation 2010 Service Pack 2 — versions 13.0.0
Microsoft Sharepoint Foundation 2013 Service Pack 1 — versions 15.0.0
Microsoft Sharepoint Server 2019 — versions 16.0.0
Microsoft Sharepoint Enterprise Server — versions 2016
Microsoft Sharepoint Foundation — versions 2010, 2013
Microsoft Sharepoint Server — versions 2019

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1707 (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2021-1707?: CVE-2021-1707 is a high-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016. CVSS score: 8.8/10. Published 2021-01-12.
How severe is CVE-2021-1707?: High severity. CVSS v3 base score is 8.8 out of 10.