CVE-2026-72989

Use of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72989	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_1809:::::::x86:*
	cpe:2.3:o:microsoft:windows_server_2019:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2022:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

History

21 Sep 2026, 15:33

Type	Values Removed	Values Added
CPE		cpe:2.3:o:microsoft:windows_10_1809:::::::x86:* cpe:2.3:o:microsoft:windows_server_2019:::::::x64:* cpe:2.3:o:microsoft:windows_10_1809:::::::x64:* cpe:2.3:o:microsoft:windows_server_2022:::::::x64:* cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72989 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72989 - Vendor Advisory, Patch
First Time		Microsoft windows Server 2022 Microsoft Microsoft windows Server 2025 Microsoft windows Server 2019 Microsoft windows 10 1809

Information

Published : 2026-09-08 18:20

Updated : 2026-09-21 15:33

NVD link : CVE-2026-72989

Mitre link : CVE-2026-72989

CVE.ORG link : CVE-2026-72989

JSON object : View

Products Affected

microsoft

windows_server_2025
windows_server_2019
windows_10_1809
windows_server_2022

CWE

CWE-908

Use of Uninitialized Resource

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