Auth bypass in Microsoft Windows 10 Version 1809
CVE-2026-69377
Missing authorization in Windows Modern Device Management (MDM) allows an authorized attacker to elevate privileges locally.
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21h2
- Microsoft Windows 10 Version 22h2
- Microsoft Windows 11 Version 23h2
- Microsoft Windows 11 Version 24h2
- Microsoft Windows 11 Version 25h2
- Microsoft Windows 11 Version 26h1
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core Installation)
- Microsoft Windows Server 2022
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-69377?
- CVE-2026-69377 is a high-severity vulnerability in Microsoft Windows 10 Version 1809, classified under Missing Authorization. CVSS score: 7.8/10. Published 2026-09-08.
- How severe is CVE-2026-69377?
- High severity. CVSS v3 base score is 7.8 out of 10.