Windows MDM EUVD-2026-100452

Exploitation requires the attacker to already be executing on the target as a low-privileged authenticated local user (CVSS PR:L, AV:L) and to reach the Windows Modern Device Management (MDM) component to drive the invalid-pointer/reference release; no user interaction is needed (UI:N). The primary limiting factors are the mandatory local foothold and the pre-existing low-privilege account - the flaw is not remotely reachable and cannot be triggered without prior access to the machine. It affects the in-box MDM functionality of Windows, so no non-default feature appears necessary, but this should be confirmed against the specific affected builds in the MSRC advisory.

This is a credible but not emergency-tier priority. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U) scores 7.8 (High) and is internally consistent with the description: local attack vector, low complexity, and an attacker who already holds low-level (authenticated/standard-user) privileges elevating to full compromise (C:H/I:H/A:H). No EPSS score, CISA KEV listing, or public POC was provided in the input, so by the precision rules this is 'no public exploit identified at time of analysis' - exploitation probability cannot be quantified from the available data. The signals are not conflicting: everything points to a classic local privilege-escalation primitive (CWE-763, release of invalid pointer/reference) requiring a prior foothold, not a remotely-reachable flaw. The input Tag 'Information Disclosure' conflicts with the description, which describes privilege elevation with full impact across C/I/A - treat the tag as mislabeled, not as evidence of an info-leak-only issue. Realistic priority is moderate-high for multi-user or managed Windows fleets where local EoP chains after initial access, but it is not a mass-exploitation / internet-facing concern on its own.

An attacker who has already gained low-privileged code execution on a Windows endpoint (for example via phishing or a standard user account) interacts with the Modern Device Management component to trigger the release of an invalid pointer or reference. By controlling the freed/invalid memory, they corrupt state to run code at SYSTEM, completing local privilege escalation. No public exploit code was identified in the provided data, and the attack requires local access rather than remote delivery.