# CVE-2026-102192: Windows Failover Cluster integer underflow denial of service

Source: https://junglewise.ai/threats/cve-2026-102192-integer-underflow-wrap-or-wraparound-in-windows-failover-cluster  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-102192 · Severity: high · CVSS 7.5 · Published 2026-10-13

Windows Failover Cluster, a Microsoft system component for clustering servers, contains an integer underflow vulnerability that allows attackers to remotely crash or disable the cluster. An attacker exploiting this flaw can disrupt business continuity for organizations that rely on clustered servers for high availability.

Technologies: [Microsoft Windows Failover Cluster](https://junglewise.ai/threats/technologies/windows-failover-cluster). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-102192 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102192 being exploited in the wild.

**How severe is CVE-2026-102192?** 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-2026-102192?** 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-2026-102192 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-102192?** Check whether you run Microsoft Windows Failover Cluster. 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 integer underflow (wrap-around) vulnerability in Windows Failover Cluster enables an unauthenticated network attacker to trigger a denial of service condition. The vulnerability allows the attacker to send crafted network traffic that causes arithmetic underflow, leading to unexpected behavior or a crash of the cluster service. No authentication is required to exploit this vulnerability over the network.

## Affected products

- Microsoft Windows Failover Cluster

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102192](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102192)

## Related threats

- [Windows Failover Cluster use after free privilege escalation](https://junglewise.ai/threats/cve-2026-119869-use-after-free-in-windows-failover-cluster-allows-an-authorized)
- [Microsoft Windows Failover Cluster denial of service via uncaught exception](https://junglewise.ai/threats/cve-2026-96945-uncaught-exception-in-windows-failover-cluster-allows-an)
- [Microsoft Windows Failover Cluster use-after-free](https://junglewise.ai/threats/cve-2026-88102-use-after-free-in-windows-failover-cluster-allows-an-unauthorized)
- [Windows Failover Cluster uncaught exception denial of service](https://junglewise.ai/threats/cve-2026-88099-uncaught-exception-in-windows-failover-cluster-allows-an)
- [Microsoft Windows Failover Cluster use-after-free code execution](https://junglewise.ai/threats/cve-2026-73010-microsoft-windows-failover-cluster-use-after-free-code-execution)