CVE-2026-66804
HIGHCVSS 7.8/10
Last modified
CVE-2026-66804 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 22H2 | >= 10.0.19045.0, < 10.0.19045.7663 |
| Microsoft | Windows 11 Version 24H2 | >= 10.0.26100.0, < 10.0.26100.9168 |
| Microsoft | Windows 11 Version 25H2 | >= 10.0.26200.0, < 10.0.26200.9168 |
| Microsoft | Windows 11 version 26H1 | >= 10.0.28000.0, < 10.0.28000.2704 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-66804?
Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-66804?
CVE-2026-66804 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-66804?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
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Are you affected by CVE-2026-66804?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST