Quick answers
- Is CVE-2026-73010 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-73010 being exploited in the wild.
- How severe is CVE-2026-73010?
- Critical severity, with a CVSS score of 9.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Failover Cluster.
- Is there a fix for CVE-2026-73010?
- 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-2026-73010 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-73010?
- 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
This is a use-after-free memory corruption vulnerability in Windows Failover Cluster that allows network-based code execution without authentication. The vulnerability exists in memory management within the cluster service, allowing an attacker to craft a specially-formed network request that causes the service to access freed memory and execute attacker-controlled code. The flaw is exploitable over the network without requiring prior authentication or user interaction, making it a high-risk remote code execution vector for systems running Windows Failover Cluster.
Affected products
- Microsoft Windows Failover Cluster
Timeline
- 2026-09-08: disclosed