Is CVE-2024-43455 in the CISA KEV catalog?

No. CVE-2024-43455 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-43455?

CVE-2024-43455 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2024-43455?

CVE-2024-43455 has an EPSS score of 1.67% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-43455?

Install KB5043135 for Windows Server 2008. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2024-43455

HIGHEPSS 74th pctl

8.8

CVSS v3

NVD

Description

Windows Remote Desktop Licensing Service Spoofing Vulnerability

CWE-20Improper Input Validation

How to fix

Remediation Available

Windows Server 2008Windows

Install:KB5043135Microsoft

Install:KB5043087Microsoft

Windows Server 2008 R2Windows

Install:KB5043129Microsoft

Install:KB5043092Microsoft

Windows Server 2012Windows

Install:KB5043125Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5043125Microsoft

Windows Server 2012 R2Windows

Install:KB5043138Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5043138Microsoft

Windows Server 2016Windows

Install:KB5043051Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5043051Microsoft

Windows Server 2019Windows

Install:KB5043050Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5043050Microsoft

Windows Server 2022Windows

Install:KB5042881Microsoft

Install:KB5042880Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5042880Microsoft

Install:KB5042881Microsoft

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

Install:KB5043055Microsoft

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

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.67%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

Embed a live status badge for CVE-2024-43455

Markdown

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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 2026-05-11.