Use After Free in Microsoft Windows 10 Version 1607
CVE-2026-65789
Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.
Vulnerability class: Use-After-Free
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
- Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
- Microsoft Windows Server 2016 — versions 10.0.14393.0
- Microsoft Windows Server 2016 (Server Core Installation) — versions 10.0.14393.0
- Microsoft Windows Server 2019 — versions 10.0.17763.0
- Microsoft Windows Server 2019 (Server Core Installation) — versions 10.0.17763.0
- Microsoft Windows Server 2022 — versions 10.0.20348.0
- Microsoft Windows Server 2025 — versions 10.0.26100.0
- Microsoft Windows Server 2025 (Server Core Installation) — versions 10.0.26100.0
Weakness classification (CWE)
References
- Windows DNS Server Remote Code Execution Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-65789?
- CVE-2026-65789 is a high-severity vulnerability in Microsoft Windows 10 Version 1607, classified under Use After Free. CVSS score: 8.1/10. Published 2026-08-11.
- How severe is CVE-2026-65789?
- High severity. CVSS v3 base score is 8.1 out of 10.