Is CVE-2021-42320 in the CISA KEV catalog?

No. CVE-2021-42320 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42320?

CVE-2021-42320 has a CVSS v3 base score of 8.0 (HIGH).

What is the EPSS score for CVE-2021-42320?

CVE-2021-42320 has an EPSS score of 1.52% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42320?

Install KB5002055 for Microsoft SharePoint Enterprise Server 2016. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-42320

HIGHEPSS 71th pctl

8.0

CVSS v3

NVD

Description

Microsoft SharePoint Server Spoofing Vulnerability

CWE-290

How to fix

Remediation Available

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB5002055Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB5002054Microsoft

Microsoft SharePoint Server Subscription EditionMicrosoft

Install:KB5002045Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

1.52%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Embed a live status badge for CVE-2021-42320

Markdown

[![CVE-2021-42320](https://tridentstack.com/cve/badge/CVE-2021-42320.svg)](https://tridentstack.com/cve/CVE-2021-42320)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-42320"><img src="https://tridentstack.com/cve/badge/CVE-2021-42320.svg" alt="CVE-2021-42320"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.