CVE-2026-72989

Analyzed Analyzed - Analysis Complete

Use of Uninitialized Resource in Windows Failover Cluster Allows Information Disclosure

Publication date: 2026-09-08

Last updated on: 2026-09-21

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-21

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-72989

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1809	to 10.0.17763.9245 (exc)
microsoft	windows_10_1809	to 10.0.17763.9245 (exc)
microsoft	windows_server_2025	to 10.0.26100.33438 (exc)
microsoft	windows_server_2019	to 10.0.17763.9245 (exc)
microsoft	windows_server_2022	to 10.0.20348.5622 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-908	The product uses or accesses a resource that has not been initialized.

Attack-Flow Graph

Executive Summary

This vulnerability involves the use of an uninitialized resource in Windows Failover Cluster. An unauthorized attacker could exploit this to disclose information over a network.

Impact Analysis

An attacker could gain access to sensitive information transmitted over the network due to improper initialization in the Windows Failover Cluster.

Compliance Impact

This vulnerability could lead to unauthorized information disclosure, potentially violating data protection requirements under GDPR or HIPAA if sensitive data is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows Failover Cluster. Monitor Microsoft's security advisories for patches and implement network segmentation to limit exposure.

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