CVE-2026-78444

Microsoft · Published September 8, 2026

8.1

CVSS v3.1

HIGH

Patch availableGet patch

Description

Microsoft Failover Cluster Remote Code Execution Vulnerability. Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)

CVSS Vector

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