Is CVE-2024-21438 in the CISA KEV catalog?

No. CVE-2024-21438 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-21438?

CVE-2024-21438 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2024-21438?

CVE-2024-21438 has an EPSS score of 2.72% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-21438?

Install KB5035858 for Windows 10. Fixes are available for 15 affected products.

CVE & CISA-KEV Catalog

CVE-2024-21438

HIGHEPSS 84th pctl

7.5

CVSS v3

NVD

Description

Microsoft AllJoyn API Denial of Service Vulnerability

CWE-369

How to fix

Remediation Available

Windows 10Windows

Install:KB5035858Microsoft

Windows 10 Version 1607Windows

Install:KB5035855Microsoft

Windows 10 Version 1809Windows

Install:KB5035849Microsoft

Windows 10 Version 21H2Windows

Install:KB5035845Microsoft

Windows 10 Version 22H2Windows

Install:KB5035845Microsoft

Windows 11 Version 22H2Windows

Install:KB5035853Microsoft

Windows 11 Version 23H2Windows

Install:KB5035853Microsoft

Windows 11 version 21H2Windows

Install:KB5035854Microsoft

Windows Server 2016Windows

Install:KB5035855Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5035855Microsoft

Windows Server 2019Windows

Install:KB5035849Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5035849Microsoft

Windows Server 2022Windows

Install:KB5035959Microsoft

Install:KB5035857Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5035857Microsoft

Install:KB5035959Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5035856Microsoft

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.72%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Vendor Advisory1

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 2024-12-05.