What is CVE-2026-50340?

CVE-2026-50340 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Use After Free. CVSS score: 8.5/10. Published 2026-07-14.

How severe is CVE-2026-50340?

High severity. CVSS v3 base score is 8.5 out of 10.

Use After Free in Microsoft Windows 11 Version 24h2

CVE-2026-50340

Use after free in Windows Runtime allows an authorized attacker to elevate privileges over a network.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0
Microsoft Windows Server 2025 — versions 10.0.26100.0
Microsoft Windows Server 2025 (Server Core Installation) — versions 10.0.26100.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2026-50340?: CVE-2026-50340 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Use After Free. CVSS score: 8.5/10. Published 2026-07-14.
How severe is CVE-2026-50340?: High severity. CVSS v3 base score is 8.5 out of 10.