Windows NTFS CVE-2026-69915

Exploitation requires the attacker to already have local, authenticated access to the target with at least low privileges (PR:L) and the ability to execute code that issues NTFS filesystem operations - there is no remote or unauthenticated vector (AV:L). The primary limiting factor is HIGH attack complexity (AC:H): the use-after-free is a race/timing-dependent condition in the NTFS kernel driver, so a successful exploit typically needs precise kernel-heap grooming and may require repeated attempts. No user interaction is needed (UI:N). Affected systems are unpatched Windows builds below the fixed versions (e.g. Windows 11 24H2 <10.0.26100.9711, Windows Server 2022 <10.0.20348.5761, Windows 10 22H2 <10.0.19044.7807); applying the Microsoft update removes the condition. Because NTFS is the default filesystem, no non-default configuration is required to be exposed - only an existing local foothold.

This is a genuine but second-tier priority. The CVSS 3.1 vector (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, base 7.0 HIGH) describes a local-only use-after-free in the Windows NTFS driver requiring an attacker who is already authenticated with low privileges, with no user interaction but HIGH attack complexity - meaning the UAF likely depends on winning a race or grooming kernel memory, not a deterministic trigger. The full C:H/I:H/A:H impact is consistent with a successful kernel-mode exploit yielding SYSTEM. No EPSS score was supplied, the CVE is NOT in CISA KEV, and no POC is referenced, so exploitation status is 'no public exploit identified at time of analysis.' There is no conflict between the signals: all point to a locally-exploitable, complexity-gated privilege-escalation bug rather than a wormable remote threat. The gating factors (local access + existing foothold + high complexity) meaningfully lower urgency versus a network-facing critical, but because NTFS is present on essentially every Windows host and a reliable exploit would grant SYSTEM, this is a worthwhile patch-cycle priority - especially on multi-user or post-compromise-sensitive systems where local EoP is the key escalation step. EPSS and any active-exploitation telemetry are missing and should be monitored.

An attacker who already has a low-privileged foothold on a Windows machine (e.g. via a standard user account, phishing payload, or a compromised service) runs a crafted program that manipulates NTFS filesystem operations to trigger the use-after-free in the kernel driver. By grooming kernel heap memory and winning the required race condition, they reclaim the freed object to corrupt kernel memory and elevate to SYSTEM. High attack complexity means exploitation may require multiple attempts; no public exploit code is currently known.