Out-of-bounds Read in Microsoft Windows 11 Version 23h2

CVE-2026-70569

Out-of-bounds read in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-70569?
CVE-2026-70569 is a high-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-09-08.
How severe is CVE-2026-70569?
High severity. CVSS v3 base score is 7.8 out of 10.