Is CVE-2021-31173 in the CISA KEV catalog?

No. CVE-2021-31173 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31173?

CVE-2021-31173 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-31173?

CVE-2021-31173 has an EPSS score of 2.08% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31173?

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

CVE & CISA-KEV Catalog

CVE-2021-31173

MEDIUMEPSS 79th pctl

5.3

CVSS v3

NVD

Description

Microsoft SharePoint Server Information Disclosure Vulnerability

CWE-200Information Exposure

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 VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

2.08%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

Embed a live status badge for CVE-2021-31173

Markdown

[![CVE-2021-31173](https://tridentstack.com/cve/badge/CVE-2021-31173.svg)](https://tridentstack.com/cve/CVE-2021-31173)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-31173"><img src="https://tridentstack.com/cve/badge/CVE-2021-31173.svg" alt="CVE-2021-31173"></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 2025-02-28.