EUVD-2026-73742
GHSA-gvv7-244c-qc99
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Cluster service accepts unauthenticated network requests per description and PR:N vector; CWE-908 leaks memory with no integrity or availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Unauthenticated remote information disclosure in Windows Failover Cluster exposes sensitive process memory to network attackers via a use of uninitialized resource flaw (CWE-908). Affected builds span Windows Server 2019, 2022, and 2025 as well as Windows 10 Version 1809 - all reachable without credentials per the AV:N/PR:N CVSS vector. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target system must have the Windows Failover Cluster feature explicitly installed and the clustering service running - this feature is not enabled by default on any affected Windows version and requires deliberate installation and configuration. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) reflects unauthenticated network exploitation with high confidentiality impact and low attack complexity, which on paper places this in a high-priority remediation band. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Microsoft has released patches for all affected versions via Windows Update and WSUS. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Failover Cluster deployments, Windows Server 2019, 2022, and 2025 systems, and identify Windows 10 Version 1809 and later installations, especially in production roles. …
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Same weakness CWE-908 – Use of Uninitialized Resource
View allSame technique Information Disclosure
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External POC / Exploit Code
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