Use-after-free in Microsoft Windows - CVE-2026-100223
Published: November 10, 2026
Vulnerability identifier: #VU164609
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100223
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escape a sandbox and elevate privileges to SYSTEM on an affected system.
The vulnerability exists due to use-after-free in Windows NTFS when sandboxed processes create reparse points targeting inaccessible files. A local user can log on to the system and run a specially crafted application to escape the sandbox and gain SYSTEM privileges.
Affected software
Microsoft Windows
How to mitigate CVE-2026-100223
Install security update from vendor's website.