High · 7.5 CVE-2026-69809 EUVD-2026-73609GHSA-6x59-3qf7-4cx8

Windows Active Directory Domain Services Denial of Service Vulnerability

Published Sep 8, 2026 · Updated Nov 10, 2026 · Assigned by microsoft

Vendor: Microsoft Product: Windows 11 version 23H2 Product: Windows 11 Version 24H2 Product: Windows 11 Version 25H2 Product: Windows 11 version 26H1 Product: Windows Server 2022 Product: Windows Server 2025 Product: Windows Server 2025 (Server Core installation) Platform: Windows

Description

Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.

Affected products

Vendor	Product	Affected	Fixed
Microsoft	Windows 11 version 23H2	10.0.22631.0 – < 10.0.22631.7582	10.0.22631.7582
Microsoft	Windows 11 Version 24H2	10.0.26100.0 – < 10.0.26100.9445	10.0.26100.9445
Microsoft	Windows 11 Version 25H2	10.0.26200.0 – < 10.0.26200.9445	10.0.26200.9445
Microsoft	Windows 11 version 26H1	10.0.28000.0 – < 10.0.28000.2954	10.0.28000.2954
Microsoft	Windows Server 2022	10.0.20348.0 – < 10.0.20348.5622	10.0.20348.5622
Microsoft	Windows Server 2025	10.0.26100.0 – < 10.0.26100.33438	10.0.26100.33438
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 – < 10.0.26100.33438	10.0.26100.33438

Advisories 2

WID-SEC-2026-3243 Microsoft Windows: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026
MSRC-CVE-2026-69809 Windows Active Directory Domain Services Denial of Service Vulnerability Microsoft Security Response Center · Sep 8, 2026

References

Windows Active Directory Domain Services Denial of Service Vulnerability vendor-advisory patch