Vulnerability in Microsoft Windows 10 Version 1607
CVE-2026-69821
Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.
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 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows Server 2012
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2012 R2 (Server Core Installation)
- Microsoft Windows Server 2012 (Server Core Installation)
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core Installation)
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core Installation)
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-69821?
- CVE-2026-69821 is a high-severity vulnerability in Microsoft Windows 10 Version 1607, classified under Improper Encoding or Escaping of Output. CVSS score: 7.8/10. Published 2026-09-08.
- How severe is CVE-2026-69821?
- High severity. CVSS v3 base score is 7.8 out of 10.