SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-1718

Microsoft SharePoint Server Tampering Vulnerability

HIGH 8.0EPSS 2.80%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Microsoft SharePoint Server Tampering Vulnerability

CVSS 3.1
8.0 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
EPSS
2.80% probability · 86th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
microsoft/sharepoint foundation
Source
secure@microsoft.com
EPSS trend
0%3%5%26 October 2026: 2.80%26 October 202626 October 2026

EPSS 2.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.