Vulnerability in Microsoft Windows 11 Version 23h2

CVE-2026-69809

Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.

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.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-69809?
CVE-2026-69809 is a high-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2026-09-08.
How severe is CVE-2026-69809?
High severity. CVSS v3 base score is 7.5 out of 10.