CVE-2026-66804

EUVD-2026-56595
Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 22.65%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7663
microsoftwindows_11_24h2
𝑥
< 10.0.26100.9106
microsoftwindows_11_25h2
𝑥
< 10.0.26200.9106
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2704
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66804