CVE-2025-21330
Windows Remote Desktop Services Denial of Service vulnerability
MSRC advisory June 9, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2025-21330
- Affected products
- Windows Remote Desktop Services Denial of Service · Microsoft Windows Remote Desktop Services Denial of Service · Microsoft
What happened
To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems.
What it means for your business
Windows Remote Desktop Services Denial of Service vulnerability (CVE-2025-21330) was added to Microsoft’s security update guidance. To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems. If you need help checking exposure, call (864) 335-9223.
EPSS probability
1.96%
Sources
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