Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-66804US | — | Exploit | ||
Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally. | ||||
references
External citations — patches, advisories, analysis.
- CVE-2026-66804 Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability - CSAFself
- CVE-2026-66804 Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability - HTMLself
- Microsoft Support Lifecycleexternal
- Common Vulnerability Scoring Systemexternal
- Microsoft Exploitability Indexexternal
remediations (9)
- FixedWindows 10 Version 22H2 for 32-bit Systems
10.0.19045.7663:Security Update:https://support.microsoft.com/help/5120249
https://support.microsoft.com/help/5120249 - FixedWindows 10 Version 22H2 for ARM64-based Systems
10.0.19045.7663:Security Update:https://support.microsoft.com/help/5120249
https://support.microsoft.com/help/5120249 - FixedWindows 10 Version 22H2 for x64-based Systems
10.0.19045.7663:Security Update:https://support.microsoft.com/help/5120249
https://support.microsoft.com/help/5120249 - FixedWindows 11 Version 24H2 for ARM64-based Systems
10.0.26100.9106:Security Hotpatch Update:https://support.microsoft.com/help/5120994
https://support.microsoft.com/help/5120994 - FixedWindows 11 Version 24H2 for x64-based Systems
10.0.26100.9106:Security Hotpatch Update:https://support.microsoft.com/help/5120994
https://support.microsoft.com/help/5120994 - FixedWindows 11 Version 25H2 for ARM64-based Systems
10.0.26200.9106:Security Hotpatch Update:https://support.microsoft.com/help/5120994
https://support.microsoft.com/help/5120994 - FixedWindows 11 Version 25H2 for x64-based Systems
10.0.26200.9106:Security Hotpatch Update:https://support.microsoft.com/help/5120994
https://support.microsoft.com/help/5120994 - FixedWindows 11 Version 26H1 for ARM64-based Systems
10.0.28000.2704:Security Update:https://support.microsoft.com/help/5121000
https://support.microsoft.com/help/5121000 - FixedWindows 11 version 26H1 for x64-based Systems
10.0.28000.2704:Security Update:https://support.microsoft.com/help/5121000
https://support.microsoft.com/help/5121000
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