How severe is CVE-2026-96864?

CVE-2026-96864 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-96864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-96864?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-96864 published?

CVE-2026-96864 was published on 2026-10-13 and last updated on 2026-10-14.

CVE-2026-96864

CVE-2026-96864 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-415.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Published: 2026-10-13
Last modified: 2026-10-14

Description

Double free in Microsoft Failover Cluster Virtual Driver allows an unauthorized attacker to execute code over a network.

Frequently asked questions

What is CVE-2026-96864?: Double free in Microsoft Failover Cluster Virtual Driver allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-96864?: CVE-2026-96864 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-96864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-96864?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-96864 published?: CVE-2026-96864 was published on 2026-10-13 and last updated on 2026-10-14.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96864

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