7.8
High
CVE-2026-66804 Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally
Description
Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 22H2 10.0 | 10.0.19045.0 → < 10.0.19045.7663 | 10.0.19045.7663 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.9168 | 10.0.26100.9168 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.9168 | 10.0.26200.9168 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2704 | 10.0.28000.2704 |
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