CVE-2026-54125 in Windows
Summary
by MITRE • 07/14/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a classic race condition flaw within the Windows Runtime environment that enables local privilege escalation through improper synchronization of concurrent execution processes. The underlying issue occurs when multiple threads or processes attempt to access shared resources simultaneously without adequate protective mechanisms, creating opportunities for malicious exploitation. Such race conditions typically arise from insufficient mutual exclusion controls during resource access operations, allowing unauthorized modifications or access patterns that can be manipulated by an attacker with legitimate user privileges.
The technical implementation of this vulnerability stems from the Windows Runtime's handling of shared system resources where concurrent access is not properly managed through synchronization primitives such as mutexes, semaphores, or critical sections. When legitimate processes attempt to modify shared state or resources while other processes are concurrently accessing the same elements, the system may execute operations in an unpredictable sequence that can be exploited. This flaw specifically manifests within the Windows Runtime framework where multiple components interact with common system resources without proper coordination, creating temporal windows where malicious actors can inject code or manipulate resource states.
From an operational perspective, this vulnerability allows an authorized attacker who already possesses standard user privileges to escalate their access level to administrator or system-level permissions through carefully orchestrated concurrent operations. The attack typically involves exploiting the timing window between resource checks and actual modifications, where the attacker can manipulate shared state elements to achieve unauthorized privilege elevation. This represents a significant security risk as it transforms what should be a controlled access model into an exploitable condition where legitimate user accounts can gain elevated system privileges through race condition manipulation.
The impact extends beyond simple privilege escalation as this vulnerability can facilitate broader compromise of the affected system, potentially enabling lateral movement and persistence mechanisms within the network environment. Attackers can leverage this condition to establish more stable footholds, access restricted system components, or deploy additional malicious payloads that would otherwise require higher privileges. The vulnerability's exploitation often aligns with attack patterns described in the attack technique matrix under privilege escalation categories where timing-based attacks leverage concurrency flaws.
Security mitigations for this vulnerability should focus on implementing proper synchronization mechanisms throughout the Windows Runtime environment, including robust mutex implementations, atomic operations, and comprehensive resource access controls that prevent concurrent modification of critical shared elements. System administrators should ensure that all components utilizing shared resources implement appropriate mutual exclusion protocols to eliminate temporal windows where race conditions can occur. Industry standards such as those defined in the common weakness enumeration framework classify this issue under cwe-362 which specifically addresses race conditions, while attack patterns in the mitre att&ck framework categorize this under privilege escalation techniques that leverage system-level concurrency flaws. Organizations should also implement regular security assessments focusing on concurrent execution patterns and resource management to identify similar vulnerabilities across their Windows Runtime implementations and ensure proper mitigation through code reviews, runtime monitoring, and system hardening measures.