How severe is CVE-2021-1718?

High severity. CVSS v3 base score is 8.0 out of 10.

Vulnerability in Microsoft Sharepoint Foundation 2010 Service Pack 2

CVE-2021-1718

Microsoft SharePoint Server Tampering Vulnerability

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

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.026 (84.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Microsoft Sharepoint Foundation 2010 Service Pack 2 — versions 13.0.0
Microsoft Sharepoint Foundation — versions 2010

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1718 (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2021-1718?: CVE-2021-1718 is a high-severity vulnerability in Microsoft Sharepoint Foundation 2010 Service Pack 2. CVSS score: 8.0/10. Published 2021-01-12.
How severe is CVE-2021-1718?: High severity. CVSS v3 base score is 8.0 out of 10.