What is CVE-2021-42309?

CVE-2021-42309 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft SharePoint Server Remote Code Execution Vulnerability

Which CVE IDs does CVE-2021-42309 cover?

CVE-2021-42309 covers the following CVE IDs: CVE-2021-42309. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2021-42309?

CVE-2021-42309 has a CVSS v3 base score of 8.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2021-42309?

CVE-2021-42309 affects 4 products, including: Microsoft SharePoint Enterprise Server 2016; Microsoft SharePoint Foundation 2013 Service Pack 1; Microsoft SharePoint Server 2019; Microsoft SharePoint Server Subscription Edition.

CVE-2021-42309HighCVSS 8.8

Microsoft SharePoint Server Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

December 14, 2021

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2021-42309 →

📋 Description

According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability? The attacker must be authenticated to the target site, with the permission to use Manage Lists within SharePoint.

🎯 Affected products4

Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Foundation 2013 Service Pack 1
Microsoft SharePoint Server 2019
Microsoft SharePoint Server Subscription Edition

✅ Remediation

KB5002055 (Security Update) — fixed build 16.0.5254.1000 KB5002054 (Security Update) — fixed build 16.0.10381.20001 KB5002045 (Security Update) — fixed build 16.0.14326.20620 KB5002071 (Security Update) — fixed build 15.0.5407.1000

🔗 References (5)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42309
patchhttps://www.microsoft.com/downloads/details.aspx?familyid=2b507dbf-c420-47ed-b73b-730eb4e8e89a
patchhttps://www.microsoft.com/downloads/details.aspx?familyid=b370a437-4452-46ed-933d-612d0a10bfc0
patchhttps://www.microsoft.com/downloads/details.aspx?familyid=c7e6c52a-88f0-484a-99c6-a2093a9d373a
patchhttps://www.microsoft.com/downloads/details.aspx?familyid=2ad2fb37-b5bc-4d0c-97e6-34c24b0763a0