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Microsoft Office SharePoint

CVE-2021-40487 — Microsoft SharePoint Server Remote Code Execution Vulnerability

Important CVSS 8.1 EPSS 0.46339 2021-10 archive

Executive Summary

None

Overview

8.1
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Oct 12 2021
Last Updated Oct 12 2021
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.46339 — 0.98662 percentile
NVD CVSS 8.1 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.1

EPSS Score

0.46339
probability of exploitation in the next 30 days
0.98662 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

3 affected products
Product KB Article Severity Impact Restart Required
Microsoft SharePoint Enterprise Server 2016 5002029 (Security Update) Important Remote Code Execution Maybe
Microsoft SharePoint Foundation 2013 Service Pack 1 5002042 (Security Update) Important Remote Code Execution Maybe
Microsoft SharePoint Server 2019 5002028 (Security Update) Important Remote Code Execution Maybe

Patches

3 patches
Article Type Restart
5002029 Security Update Maybe
5002042 Security Update Maybe
5002028 Security Update Maybe

Known Exploits

On This Page