Is CVE-2021-31174 in the CISA KEV catalog?

No. CVE-2021-31174 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31174?

CVE-2021-31174 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-31174?

CVE-2021-31174 has an EPSS score of 2.94% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31174?

Install KB5001936 for Microsoft Excel 2013 RT Service Pack 1. Fixes are available for 8 affected products.

CVE & CISA-KEV Catalog

CVE-2021-31174

MEDIUMEPSS 85th pctl

5.5

CVSS v3

NVD

Description

Microsoft Excel Information Disclosure Vulnerability

CWE-125Out-of-bounds Read

How to fix

Remediation Available

Microsoft Excel 2013 RT Service Pack 1Microsoft

Install:KB5001936

Microsoft Excel 2013 Service Pack 1Microsoft

Install:KB5001936Microsoft

Microsoft Excel 2016Microsoft

Install:KB5001918Microsoft

Microsoft Office 2013 RT Service Pack 1Microsoft

Install:KB5001927

Microsoft Office 2013 Service Pack 1Microsoft

Install:KB5001927Microsoft

Microsoft Office 2016Microsoft

Install:KB5001923Microsoft

Microsoft Office Online ServerMicrosoft

Install:KB5001914Microsoft

Microsoft Office Web Apps Server 2013 Service Pack 1Microsoft

Install:KB5001928Microsoft

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 ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

2.94%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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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.