Is CVE-2021-28454 in the CISA KEV catalog?

No. CVE-2021-28454 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28454?

CVE-2021-28454 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-28454?

CVE-2021-28454 has an EPSS score of 3.14% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28454?

Install KB3017810 for Microsoft Excel 2010 Service Pack 2. Fixes are available for 10 affected products.

CVE & CISA-KEV Catalog

CVE-2021-28454

HIGHEPSS 86th pctl

7.8

CVSS v3

NVD

Description

Microsoft Excel Remote Code Execution Vulnerability

CWE-416Use After Free

How to fix

Remediation Available

Microsoft Excel 2010 Service Pack 2Microsoft

Install:KB3017810Microsoft

Microsoft Excel 2013 RT Service Pack 1Microsoft

Install:KB4504735

Microsoft Excel 2013 Service Pack 1Microsoft

Install:KB4504735Microsoft

Microsoft Excel 2016Microsoft

Install:KB4504721Microsoft

Microsoft Office 2010 Service Pack 2Microsoft

Install:KB4504739Microsoft

Microsoft Office 2013 RT Service Pack 1Microsoft

Install:KB4504727

Microsoft Office 2013 Service Pack 1Microsoft

Install:KB4504727Microsoft

Microsoft Office 2016Microsoft

Install:KB4504724Microsoft

Microsoft Office Online ServerMicrosoft

Install:KB4504714Microsoft

Microsoft Office Web Apps Server 2013 Service Pack 1Microsoft

Install:KB4504729Microsoft

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 RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.14%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Third-Party Advisory1

zerodayinitiative.com

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	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.