What is CVE-2026-97830?

CVE-2026-97830 is a high-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Double Free. CVSS score: 7.5/10. Published 2026-10-13.

How severe is CVE-2026-97830?

High severity. CVSS v3 base score is 7.5 out of 10.

Double Free in Microsoft Windows 11 Version 23h2

CVE-2026-97830

Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.

Vulnerability class: Double Free

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-415 — Double Free

References

Windows Internet Information Services Denial of Service Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-97830?: CVE-2026-97830 is a high-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Double Free. CVSS score: 7.5/10. Published 2026-10-13.
How severe is CVE-2026-97830?: High severity. CVSS v3 base score is 7.5 out of 10.