CVE-2026-66804 HIGH

CVE-2026-66804: Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability

Vendor Microsoft
Product Windows 10 Version 22H2
Weakness CWE-284
Published August 11, 2026
Last update August 20, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

August 11, 2026 CVE published
August 20, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2025-11163 SmartCrawl SEO checker, analyzer & optimizer <= 3.14.3 - Missing Authorization to Plugin Settings Update CVE-2026-0844 Simple User Registration <= 6.7 - Authenticated (Subscriber+) Privilege Escalation via profile_save_field CVE-2024-13430 Page Builder: Pagelayer – Drag and Drop website builder <= 1.9.8 - Authenticated (Contributor+) Private Post Disclosure in pagelayer_builder_posts_shortcode CVE-2026-62414 Joomla Extension - joomlack.fr - Improper access control in Page Builder CK < 3.6.2 CVE-2026-48958 Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints