CVE-2024-43455: Windows Remote Desktop Licensing Service Spoofing Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-10 · updated 2026-08-10
Weakness: CWE-20

Description

Windows Remote Desktop Licensing Service Spoofing Vulnerability

Affected products

Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.7336 — fixed in 10.0.14393.7336
Microsoft Windows Server 2019: before 10.0.17763.6293 — fixed in 10.0.17763.6293
Microsoft Windows Server 2022: before 10.0.20348.2700 — fixed in 10.0.20348.2700
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1128 — fixed in 10.0.25398.1128
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.27320 — fixed in 6.1.7601.27320
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.22870 — fixed in 6.0.6003.22870
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25073 — fixed in 6.2.9200.25073
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22175 — fixed in 6.3.9600.22175
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.7336 — fixed in 10.0.14393.7336
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.6293 — fixed in 10.0.17763.6293
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.2700 — fixed in 10.0.20348.2700
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1128 — fixed in 10.0.25398.1128

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.7336; Microsoft Windows Server 2019 10.0.17763.6293; Microsoft Windows Server 2022 10.0.20348.2700; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1128; Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27320; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.22870; Microsoft Windows Server 2012 6.2.9200.25073; Microsoft Windows Server 2012 R2 6.3.9600.22175; Microsoft Windows Server 2016 10.0.14393.7336; Microsoft Windows Server 2019 10.0.17763.6293; Microsoft Windows Server 2022 10.0.20348.2700; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1128. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43455

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