CVE-2026-96215 in Windows
Summary
by MITRE • 10/14/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Autopilot allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability described constitutes a classic race condition within the Microsoft Windows Autopilot infrastructure, specifically arising from concurrent access to a shared resource without adequate synchronization mechanisms. This flaw is categorized under CWE-362, which defines race conditions as situations where multiple threads or processes execute concurrently and their outcome depends on the precise timing of execution, often leading to unpredictable behavior when proper locking or atomic operations are absent. In this specific context, the vulnerability resides in a component responsible for handling device provisioning states during the Autopilot setup process. The core technical flaw involves a time-of-check-to-time-of-use (TOCTOU) scenario where an attacker can manipulate the state of a shared resource between the moment it is checked and the moment it is used by the privileged system service. This allows an authorized local user to bypass intended security restrictions, effectively gaining unauthorized access to higher privilege levels than originally granted.
From an operational perspective, this vulnerability poses a significant risk to organizations relying on Windows Autopilot for zero-touch device deployment. An attacker with valid credentials and local access can exploit the race condition to escalate privileges from a standard user account to that of SYSTEM or another high-privilege role. This escalation enables the execution of arbitrary code, modification of system configurations, installation of persistent malware, and exfiltration of sensitive data stored on the device. The impact is particularly severe because Autopilot devices are often new or freshly imaged systems where security baselines might still be being established, making them potentially more susceptible to initial compromise before full endpoint protection suites are fully operational.
The exploitation vector aligns with MITRE ATT&CK technique T1068, which covers Exploitation for Privilege Escalation, and specifically relates to the sub-technique of exploiting race conditions in local services. The attacker must be able to execute code locally on the target machine, typically requiring physical access or prior compromise via phishing or network-based attacks that result in low-level user access. Once this foothold is established, the attacker leverages the timing window inherent in the Autopilot service's handling of shared resources to inject malicious logic or alter configuration files before they are processed by the privileged component. This bypasses standard authentication and authorization checks because the race condition allows the attacker to trick the system into accepting a modified state that would otherwise be rejected if accessed sequentially with proper synchronization.
Mitigation strategies for this vulnerability primarily involve applying vendor-provided security patches that address the underlying code flaw by implementing robust locking mechanisms or atomic operations around the shared resource access points. Organizations should ensure that all Windows Autopilot-enabled devices are updated to the latest cumulative updates released by Microsoft, which include fixes for known race conditions in system components. Additionally, enforcing strict local administrator policies and limiting user privileges can reduce the attack surface available to potential exploiters. Implementing application control solutions such as AppLocker or Windows Defender Application Control (WDAC) can further restrict the execution of unauthorized binaries that might be used during the exploitation phase. Regular auditing of device configuration states and monitoring for anomalous privilege escalation events are also recommended defensive measures to detect any attempted exploitation in real-time.