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Microsoft Windows RDP security warning dialog rendering issue after April 2026 updates

Security Tool/Service
First reported
Last updated
Happening score
H score 11
1 unique sources, 1 articles

Summary

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Microsoft confirmed that newly introduced Windows security warnings for opening Remote Desktop (.rdp) files can display incorrectly, reducing users' ability to review or use the dialog safely. The issue affects Windows 11, Windows 10, and Windows Server after the April 2026 cumulative updates. On systems with multiple monitors using different scaling, the warning text can overlap and buttons can be partially hidden. That weakens a control intended to help users spot potentially malicious RDP connection files before connecting.

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Timeline

  1. 28.04.2026 12:51 2 articles · 2mo ago

    Microsoft confirms Remote Desktop warning dialog rendering issue

    Initial Disclosure

    Microsoft confirmed that newly introduced Windows security warnings for opening Remote Desktop (.rdp) files may display incorrectly on supported Windows systems, including Windows 11, Windows 10, and Windows Server, after the April 2026 cumulative updates introduced the new RDP protection flow. On some systems using multiple monitors with different display scaling settings, the warning window can show overlapping text or partially hidden buttons, making the security dialog difficult or impossible to read and interact with.

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