EUVD-2026-56732
GHSA-6cpc-jr7h-9mmg
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only vector, low-privilege account prerequisite, and use-after-free race condition justify AV:L/AC:H/PR:L; full SYSTEM takeover yields C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Autopilot allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Autopilot on Windows 11 (versions 24H2, 25H2, and 26H1) is caused by a use-after-free memory corruption flaw (CWE-416) that allows a locally authenticated low-privileged attacker to achieve SYSTEM-level access. The CVSS 7.0 score reflects full CIA impact offset by a strictly local attack vector and high attack complexity, consistent with a race condition or heap manipulation requirement rather than a trivial trigger. No public exploit code or CISA KEV listing has been identified at time of analysis.
Technical ContextAI
Windows Autopilot is Microsoft's cloud-orchestrated device provisioning and enrollment service used in enterprise Windows 11 deployments to automate out-of-box configuration and Azure AD/Intune onboarding. CWE-416 (Use After Free) arises when a component continues referencing a memory pointer after the underlying allocation has been freed, creating a window where an attacker can influence the contents of that reallocated memory region. In local privilege escalation contexts, use-after-free bugs typically target kernel-mode structures or privileged service memory - such as process security tokens or function dispatch tables - enabling an attacker to redirect execution to attacker-controlled code at an elevated privilege level. The CVSS vector AV:L/AC:H/PR:L is consistent with a flaw in a local service or driver component that requires an authenticated session and successful exploitation of a non-deterministic condition such as a race or specific heap state. The associated tags ('Memory Corruption', 'Use After Free', 'Denial Of Service') indicate the freed memory misuse can alternatively crash the affected component, producing a secondary availability impact.
RemediationAI
Apply the vendor-released patch via Windows Update or Microsoft Update Catalog targeting the following fixed builds: 10.0.26200.9168 or later for Windows 11 25H2, 10.0.26100.9168 or later for Windows 11 24H2, and 10.0.28000.2704 or later for Windows 11 26H1, per the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65779. No specific workaround is documented in the available data; however, as an interim compensating control, organizations should enforce strict local account hygiene - removing unnecessary local user accounts, ensuring Autopilot-enrolled devices are not accessible to untrusted users, and applying Windows Defender Credential Guard to limit token manipulation post-exploitation. Note that restricting local interactive access addresses the PR:L prerequisite but does not eliminate the underlying flaw; patching remains the only definitive remediation.
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today