What is CVE-2026-69599?

CVE-2026-69599 is a high-severity vulnerability in Microsoft Windows 11 23h2, classified under Use After Free. CVSS score: 7.5/10. Published 2026-09-08.

How severe is CVE-2026-69599?

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

Use After Free in Microsoft Windows 11 23h2

CVE-2026-69599

Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over a network.

Vulnerability class: Use-After-Free

Published 2026-09-08 · last modified 2026-09-14.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.007 (51.1th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

Remote Desktop Services Remote Code Execution Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-69599?: CVE-2026-69599 is a high-severity vulnerability in Microsoft Windows 11 23h2, classified under Use After Free. CVSS score: 7.5/10. Published 2026-09-08.
How severe is CVE-2026-69599?: High severity. CVSS v3 base score is 7.5 out of 10.