Is CVE-2021-28453 in the CISA KEV catalog?

No. CVE-2021-28453 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28453?

CVE-2021-28453 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-28453?

CVE-2021-28453 has an EPSS score of 4.07% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28453?

Install KB4493215 for Microsoft Office 2010 Service Pack 2. Fixes are available for 12 affected products.

CVE & CISA-KEV Catalog

CVE-2021-28453

HIGHEPSS 89th pctl

7.8

CVSS v3

NVD

Description

Microsoft Word Remote Code Execution Vulnerability

How to fix

Remediation Available

Microsoft Office 2010 Service Pack 2Microsoft

Install:KB4493215Microsoft

Microsoft Office Online ServerMicrosoft

Install:KB4504714Microsoft

Microsoft Office Web Apps 2010 Service Pack 2Microsoft

Install:KB4504705Microsoft

Microsoft Office Web Apps Server 2013 Service Pack 1Microsoft

Install:KB4504729Microsoft

Microsoft SharePoint Enterprise Server 2013 Service Pack 1Microsoft

Install:KB4493201Microsoft

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB4504719Microsoft

Install:KB4504723Microsoft

Microsoft SharePoint Server 2010 Service Pack 2Microsoft

Install:KB4504701Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB4504715Microsoft

Install:KB4504716Microsoft

Microsoft Word 2010 Service Pack 2Microsoft

Install:KB4493218Microsoft

Microsoft Word 2013 RT Service Pack 1Microsoft

Install:KB4493208

Microsoft Word 2013 Service Pack 1Microsoft

Install:KB4493208Microsoft

Microsoft Word 2016Microsoft

Install:KB4493198Microsoft

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

4.07%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Third-Party Advisory1

zerodayinitiative.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.