What is CVE-2026-73010?

CVE-2026-73010 is a critical-severity vulnerability in Microsoft Windows 10 Version 1809, classified under Use After Free. CVSS score: 9.8/10. Published 2026-09-08.

How severe is CVE-2026-73010?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Microsoft Windows 10 Version 1809

CVE-2026-73010

Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Windows 10 Version 1809
Microsoft Windows Server 2019
Microsoft Windows Server 2019 (Server Core Installation)
Microsoft Windows Server 2022
Microsoft Windows Server 2025
Microsoft Windows Server 2025 (Server Core Installation)

Weakness classification (CWE)

CWE-416 — Use After Free

References

Microsoft Failover Cluster Remote Code Execution Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-73010?: CVE-2026-73010 is a critical-severity vulnerability in Microsoft Windows 10 Version 1809, classified under Use After Free. CVSS score: 9.8/10. Published 2026-09-08.
How severe is CVE-2026-73010?: Critical severity. CVSS v3 base score is 9.8 out of 10.