Quick answers
- Is CVE-2026-96945 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-96945 being exploited in the wild.
- How severe is CVE-2026-96945?
- High severity, with a CVSS score of 7.5, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Windows Failover Cluster.
- Is there a fix for CVE-2026-96945?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-96945 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-96945?
- Check whether you run Microsoft Windows Failover Cluster, Microsoft Windows Server 2019, Microsoft Windows Server 2022 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An uncaught exception in Windows Failover Cluster can be triggered remotely over the network by an unauthenticated attacker, leading to denial of service. The vulnerability requires only network access to the cluster service without prior authentication or user interaction. Exploitation results in crash of the failover cluster service, disrupting availability of clustered applications.
Affected products
- Microsoft Windows Failover Cluster
Timeline
- 2026-10-13: disclosed