Is CVE-2024-43621 in the CISA KEV catalog?

No. CVE-2024-43621 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-43621?

CVE-2024-43621 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2024-43621?

CVE-2024-43621 has an EPSS score of 1.52% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-43621?

Install KB5046665 for Windows 10. Fixes are available for 23 affected products.

CVE & CISA-KEV Catalog

CVE-2024-43621

HIGHEPSS 71th pctl

8.8

CVSS v3

NVD

Description

Windows Telephony Service Remote Code Execution Vulnerability

CWE-122Heap-based Buffer Overflow

How to fix

Remediation Available

Windows 10Windows

Install:KB5046665Microsoft

Windows 10 Version 1607Windows

Install:KB5046612Microsoft

Windows 10 Version 1809Windows

Install:KB5046615Microsoft

Windows 10 Version 21H2Windows

Install:KB5046613Microsoft

Windows 10 Version 22H2Windows

Install:KB5046613Microsoft

Windows 11 Version 22H2Windows

Install:KB5046633Microsoft

Windows 11 Version 23H2Windows

Install:KB5046633Microsoft

Windows 11 Version 24H2Windows

Install:KB5046696Microsoft

Install:KB5046617Microsoft

Windows Server 2008Windows

Install:KB5046639Microsoft

Install:KB5046661Microsoft

Windows Server 2008 R2Windows

Install:KB5046705Microsoft

Install:KB5046687Microsoft

Windows Server 2012Windows

Install:KB5046697Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5046697Microsoft

Windows Server 2012 R2Windows

Install:KB5046682Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5046682Microsoft

Windows Server 2016Windows

Install:KB5046612Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5046612Microsoft

Windows Server 2019Windows

Install:KB5046615Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5046615Microsoft

Windows Server 2022Windows

Install:KB5046698Microsoft

Install:KB5046616Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5046616Microsoft

Install:KB5046698Microsoft

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

Install:KB5046618Microsoft

Windows Server 2025Windows

Install:KB5046696Microsoft

Install:KB5046617Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5046696Microsoft

Install:KB5046617Microsoft

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.52%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2024-26256	High	7.8	88%	-	Fix
CVE-2020-25687	Medium	5.9	87%	-	Fix
CVE-2009-3459	High	8.8	86%	KEV	Fix
CVE-2021-21017	High	8.8	86%	KEV	-
CVE-2020-25683	Medium	5.9	86%	-	Fix

Embed a live status badge for CVE-2024-43621

Markdown

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HTML

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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 2024-11-15.