What is CVE-2026-72958?

CVE-2026-72958 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Double Free. CVSS score: 8.2/10. Published 2026-09-08.

How severe is CVE-2026-72958?

High severity. CVSS v3 base score is 8.2 out of 10.

Double Free in Microsoft Windows 11 Version 24h2

CVE-2026-72958

Double free in Windows Credential Guard allows an authorized attacker to elevate privileges locally.

Vulnerability class: Double Free

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Microsoft Windows 11 Version 24h2
Microsoft Windows 11 Version 25h2
Microsoft Windows 11 Version 26h1
Microsoft Windows Server 2025
Microsoft Windows Server 2025 (Server Core Installation)

Weakness classification (CWE)

CWE-415 — Double Free

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-72958?: CVE-2026-72958 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Double Free. CVSS score: 8.2/10. Published 2026-09-08.
How severe is CVE-2026-72958?: High severity. CVSS v3 base score is 8.2 out of 10.