Is CVE-2021-31171 in the CISA KEV catalog?

No. CVE-2021-31171 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31171?

CVE-2021-31171 has a CVSS v3 base score of 4.1 (MEDIUM).

What is the EPSS score for CVE-2021-31171?

CVE-2021-31171 has an EPSS score of 0.65% (47th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31171?

Install KB5001917 for Microsoft SharePoint Enterprise Server 2016. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-31171

MEDIUM

4.1

CVSS v3

NVD

Description

Microsoft SharePoint Information Disclosure Vulnerability

How to fix

Remediation Available

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB5001917Microsoft

Microsoft SharePoint Foundation 2013 Service Pack 1Microsoft

Install:KB5001935Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB5001916Microsoft

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 VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.65%probability of exploitation in 30 days

47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

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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.