CVE-2026-50460 in Windows
Summary
by MITRE • 07/14/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a classic race condition flaw within the Windows Runtime environment that enables remote privilege escalation attacks. The core issue stems from improper synchronization mechanisms when multiple concurrent processes or threads access shared resources without adequate protective measures. When legitimate system components attempt to manipulate shared data structures or system objects, attackers can exploit timing windows to interfere with these operations and gain elevated privileges.
The technical implementation involves a race condition scenario where an unauthorized attacker can manipulate shared resources during the window between when a resource is checked for access permissions and when the actual operation is performed. This type of vulnerability falls under CWE-362 which specifically addresses race conditions in software systems. The Windows Runtime environment provides multiple entry points where such conditions can manifest, particularly around object creation, memory management, and inter-process communication mechanisms that are commonly used by system services.
From an operational perspective, this vulnerability allows attackers to execute remote code with elevated privileges without requiring local system access or prior authentication. The attack typically involves crafting specific sequences of operations that exploit the timing gap in resource access control, enabling the execution of malicious code with SYSTEM level privileges. The impact extends beyond simple privilege escalation as it can potentially allow attackers to establish persistent backdoors, modify critical system files, or exfiltrate sensitive data from compromised systems.
The attack surface for this vulnerability encompasses various Windows Runtime components including Windows Management Instrumentation, Windows Store applications, and Universal Windows Platform applications that utilize shared memory segments or inter-process communication channels. According to ATT&CK framework, this vulnerability maps to T1068 (Local Privilege Escalation) and potentially T1547 (Registry Run Keys) when attackers leverage the elevated privileges for persistence mechanisms. The exploitation requires minimal user interaction and can be automated through network-based attack vectors.
Mitigation strategies should focus on implementing proper synchronization primitives such as mutexes, semaphores, or atomic operations to prevent concurrent access issues during critical resource operations. Microsoft recommends applying security updates promptly and implementing application whitelisting policies to restrict execution of unauthorized code. System administrators should also configure appropriate access control lists and monitor for unusual process behavior that might indicate exploitation attempts. Additionally, deploying intrusion detection systems capable of identifying suspicious inter-process communication patterns can help detect potential exploitation attempts targeting this class of vulnerability.