CVE-2025-33054: Remote Desktop Spoofing Vulnerability

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-08 · updated 2026-06-17
Weakness: CWE-357

Description

Insufficient UI warning of dangerous operations in Remote Desktop Client allows an unauthorized attacker to perform spoofing over a network.

Affected products

Microsoft Windows 11: before 10.0.22621.5624 — fixed in 10.0.22621.5624
Microsoft Windows 11: before 10.0.22631.5624 — fixed in 10.0.22631.5624
Microsoft Windows 11: before 10.0.26100.4652 — fixed in 10.0.26100.4652
Microsoft Windows Server 2025: before 10.0.26100.4652 — fixed in 10.0.26100.4652
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.5624 — fixed in 10.0.22621.5624
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.5624 — fixed in 10.0.22631.5624
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.5624 — fixed in 10.0.22631.5624
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.4652 — fixed in 10.0.26100.4652
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.4652 — fixed in 10.0.26100.4652

How to fix

Upgrade to a fixed version: Microsoft Windows 11 10.0.22621.5624; Microsoft Windows 11 10.0.22631.5624; Microsoft Windows 11 10.0.26100.4652; Microsoft Windows Server 2025 10.0.26100.4652; Microsoft Windows 11 10.0.22621.5624; Microsoft Windows 11 version 22H3 10.0.22631.5624; Microsoft Windows 11 10.0.22631.5624; Microsoft Windows 11 10.0.26100.4652; Microsoft Windows Server 2025 10.0.26100.4652. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33054

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