CVE-2026-24295: Windows Device Association Race Condition

CVE-2026-24295 Overview

CVE-2026-24295 is a race condition vulnerability in the Windows Device Association Service that enables local privilege escalation. The vulnerability stems from concurrent execution using a shared resource with improper synchronization (CWE-362), allowing an authorized attacker to elevate privileges on the local system.

This flaw in the Windows Device Association Service can be exploited by attackers who already have local access to a Windows system. By exploiting the timing window created by the race condition, an attacker can manipulate shared resources to gain elevated privileges, potentially achieving SYSTEM-level access.

Critical Impact

Local privilege escalation allowing authorized attackers to elevate privileges on Windows systems through race condition exploitation in the Device Association Service.

Affected Products

• Windows Device Association Service
• Microsoft Windows (versions to be confirmed via Microsoft advisory)

Discovery Timeline

• 2026-03-10 - CVE CVE-2026-24295 published to NVD
• 2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-24295

Vulnerability Analysis

This vulnerability exists within the Windows Device Association Service, a system component responsible for managing device pairing and association operations. The root cause is a race condition (CWE-362) where concurrent execution occurs using shared resources without proper synchronization mechanisms in place.

Race conditions in Windows services are particularly dangerous because they can be exploited to bypass security boundaries. In this case, the vulnerability requires local access and low-level privileges to exploit, but successful exploitation results in high impact across confidentiality, integrity, and availability of the affected system.

The complexity of exploitation is considered high due to the timing-sensitive nature of race condition attacks. An attacker must precisely time their malicious operations to coincide with legitimate service operations to successfully hijack execution flow or manipulate shared state.

Root Cause

The vulnerability originates from improper synchronization in the Windows Device Association Service when handling concurrent operations on shared resources. The service fails to implement adequate locking mechanisms or atomic operations when multiple threads or processes access critical data structures simultaneously.

This Time-of-Check-Time-of-Use (TOCTOU) pattern allows an attacker to modify a resource between the point where it is validated and when it is used, effectively bypassing security controls and elevating privileges.

Attack Vector

The attack vector is local, requiring the attacker to have prior access to the target system with low-level privileges. The attacker exploits the race condition by:

1. Monitoring the Windows Device Association Service for vulnerable operations
2. Timing malicious requests to coincide with legitimate service operations
3. Manipulating shared resources during the vulnerable timing window
4. Achieving privilege escalation when the service processes the manipulated state

The attack does not require user interaction, but its high complexity stems from the precise timing required to successfully exploit the race condition window.

Detection Methods for CVE-2026-24295

Indicators of Compromise

• Unusual process spawning from the Windows Device Association Service with elevated privileges
• Abnormal access patterns to Device Association Service shared resources or memory regions
• Unexpected privilege token modifications associated with Device Association Service processes

Detection Strategies

• Monitor Windows Device Association Service (DeviceAssociationService) for anomalous behavior and unexpected child processes
• Implement process monitoring for privilege escalation attempts originating from standard user contexts
• Enable Windows Security Event logging for privilege changes (Event ID 4672, 4673) associated with service accounts

Monitoring Recommendations

• Configure endpoint detection solutions to alert on suspicious Device Association Service activity
• Monitor for rapid, repeated access attempts to service-managed resources that may indicate race condition exploitation attempts
• Implement behavioral analysis to detect privilege escalation attack patterns

How to Mitigate CVE-2026-24295

Immediate Actions Required

• Apply Microsoft security updates as soon as they become available
• Review system access controls to limit local access to trusted users only
• Monitor affected systems for signs of exploitation attempts until patches are applied
• Consider temporarily restricting access to systems where the Device Association Service is critical

Patch Information

Microsoft has released a security advisory for this vulnerability. Administrators should consult the Microsoft CVE-2026-24295 Advisory for official patch information, affected versions, and update guidance.

Apply the latest Windows security updates through Windows Update or Windows Server Update Services (WSUS) to remediate this vulnerability.

Workarounds

• Limit local access to affected systems to trusted administrators only
• Implement application whitelisting to prevent unauthorized code execution
• Enable Windows Defender Credential Guard where supported to add additional protection against privilege escalation
• Monitor and audit local user account activities for suspicious privilege changes

# Check Windows Device Association Service status
sc query "DeviceAssociationService"

# Review service security descriptor
sc sdshow "DeviceAssociationService"

# Monitor for security events related to privilege changes
wevtutil qe Security /q:"*[System[(EventID=4672 or EventID=4673)]]" /f:text /c:50