Is CVE-2021-28450 in the CISA KEV catalog?

No. CVE-2021-28450 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28450?

CVE-2021-28450 has a CVSS v3 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2021-28450?

CVE-2021-28450 has an EPSS score of 2.40% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28450?

Install KB4493170 for Microsoft SharePoint Enterprise Server 2013 Service Pack 1. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-28450

MEDIUMEPSS 82th pctl

5.0

CVSS v3

NVD

Description

Microsoft SharePoint Denial of Service Vulnerability

How to fix

Remediation Available

Microsoft SharePoint Enterprise Server 2013 Service Pack 1Microsoft

Install:KB4493170Microsoft

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB4504719Microsoft

Microsoft SharePoint Foundation 2010 Service Pack 2Microsoft

Install:KB4504709Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB4504716Microsoft

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 ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

2.40%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% 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.