CVE-2025-21297: Windows Remote Desktop Services Remote Code Execution Vulnerability

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-01-14 · updated 2026-06-17
Weakness: CWE-416

Description

Windows Remote Desktop Services Remote Code Execution Vulnerability

Affected products

Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.7699 — fixed in 10.0.14393.7699
Microsoft Windows Server 2019: before 10.0.17763.6775 — fixed in 10.0.17763.6775
Microsoft Windows Server 2022: before 10.0.20348.3091 — fixed in 10.0.20348.3091
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1369 — fixed in 10.0.25398.1369
Microsoft Windows Server 2025: before 10.0.26100.2894 — fixed in 10.0.26100.2894
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.27520 — fixed in 6.1.7601.27520
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25273 — fixed in 6.2.9200.25273
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22371 — fixed in 6.3.9600.22371
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.7699 — fixed in 10.0.14393.7699
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.6775 — fixed in 10.0.17763.6775
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.3091 — fixed in 10.0.20348.3091
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1369 — fixed in 10.0.25398.1369
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.2894 — fixed in 10.0.26100.2894

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.7699; Microsoft Windows Server 2019 10.0.17763.6775; Microsoft Windows Server 2022 10.0.20348.3091; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1369; Microsoft Windows Server 2025 10.0.26100.2894; Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27520; Microsoft Windows Server 2012 6.2.9200.25273; Microsoft Windows Server 2012 R2 6.3.9600.22371; Microsoft Windows Server 2016 10.0.14393.7699; Microsoft Windows Server 2019 10.0.17763.6775; Microsoft Windows Server 2022 10.0.20348.3091; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1369. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21297

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