Use After Free in Microsoft Windows 10 Version 1809
CVE-2026-49167
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Vulnerability class: Use-After-Free
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
- Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
- Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
- Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
- Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
- Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0
- 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
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-49167?
- CVE-2026-49167 is a medium-severity vulnerability in Microsoft Windows 10 Version 1809, classified under Use After Free. CVSS score: 4.7/10. Published 2026-07-14.
- How severe is CVE-2026-49167?
- Medium severity. CVSS v3 base score is 4.7 out of 10.