CVE-2026-78444

Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

Scoring

Severity

HIGH

CVSS base score

8.1

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

CWE

CWE-822

Published

2026-09-08

Last modified

2026-09-09

Affected products

• Microsoft Windows 10 Version 1809
• Microsoft Windows Server 2019
• Microsoft Windows Server 2019 (Server Core installation)
• Microsoft Windows Server 2022
• Microsoft Windows Server 2025
• Microsoft Windows Server 2025 (Server Core installation)

Weakness type

• CWE-822

Related vulnerabilities

• CVE-2026-83498 — Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability
• CVE-2026-83939 — Windows Secure Kernel Mode Elevation of Privilege Vulnerability
• CVE-2026-78451 — Microsoft Windows SCSI Class System File Elevation of Privilege Vulnerability
• CVE-2026-72938 — Microsoft Office PowerPoint Information Disclosure Vulnerability
• CVE-2026-72956 — Microsoft Office PowerPoint Information Disclosure Vulnerability
• CVE-2026-69874 — Windows ALPC Elevation of Privilege Vulnerability
• CVE-2026-69900 — Kernel Streaming WOW Thunk Service Driver Elevation of Privilege Vulnerability
• CVE-2026-69569 — Windows Print Spooler Components Denial of Service Vulnerability

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