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Vulnerability record · CVE-2026-66804 · published 11 August 2026

CVE-2026-66804: Microsoft windows 10 22h2 improper access control vulnerability

Microsoft · Windows 10 22h2

Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.

7.8 CVSS 3.1 High EPSS 0.30% · top 79.8% CWE-284 · Improper access control
7.8CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
1References
14 Aug 2026Last modified by NVD

Description

Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66804 Vendor AdvisoryPatch

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Source: NIST National Vulnerability Database (record CVE-2026-66804), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.