Microsoft Windows CVE-2025-62569

Exploitation requires the attacker to already have authenticated local access and the ability to execute code on the target (PR:L, AV:L) - this cannot be triggered remotely or by an unauthenticated user. The vulnerable code path is the Windows Brokering File System, a built-in OS component, so no non-default feature toggle is implied by the data; however, the high attack complexity (AC:H) means successful exploitation depends on winning a race or achieving a specific memory state typical of use-after-free bugs, limiting reliability. No user interaction is required (UI:N). The primary limiting factors are the need for prior local foothold and the timing/state precision required.

This is a moderate-priority local elevation-of-privilege flaw rather than a widespread emergency. 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) shows the attacker must already have local, authenticated access (PR:L) and must win against high attack complexity (AC:H) - characteristic of a use-after-free (CWE-416) that likely depends on a race condition or precise memory-state manipulation, which materially lowers reliability of exploitation. The real-world exploitation signals are calm: EPSS is only 0.33% (24th percentile), the CVE is NOT on CISA KEV, and no public POC or exploit code is referenced, so there is no evidence of active or imminent exploitation. The signals are internally consistent - low EPSS, no KEV, and high attack complexity all point the same direction: a legitimate but not urgent patch-cycle item. The chief caveat is that the ONLY reference is the vendor MSRC advisory; no independent technical write-up, patch KB number, or third-party analysis was supplied, so exploit maturity and exact fixed builds cannot be independently verified here.

A low-privileged but authenticated local user (e.g., a standard account on a shared workstation, RDP session, or a process running at low integrity) runs code that triggers the use-after-free in the Windows Brokering File System and races to reclaim the freed object with attacker-controlled data, corrupting memory to run code at SYSTEM. Because AC:H implies a timing/race or specific-state dependency, the attack may require multiple attempts and is not a guaranteed single-shot. No public exploit code was identified at time of analysis.