Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.
Security updates
6.2.9200.26434 — https://support.microsoft.com/help/5126835
6.3.9600.23470 — https://support.microsoft.com/help/5126836
10.0.14393.9612 — https://support.microsoft.com/help/5126868
10.0.17763.9376 — https://support.microsoft.com/help/5126651
10.0.26100.33650 — https://support.microsoft.com/help/5126646
10.0.20348.5761 — https://support.microsoft.com/help/5126655
Vulnerabilities 1
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Critical 9.8
Microsoft Failover Cluster Virtual Driver Remote Code Execution Vulnerability
Double free in Microsoft Failover Cluster Virtual Driver allows an unauthorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-96864 Microsoft Failover Cluster Virtual Driver Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96864
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss