CVE-2026-58543 in Windows
Summary
by MITRE • 07/14/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows USB Print Driver allows an authorized attacker to elevate privileges with a physical attack.
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a classic race condition flaw in the Windows USB print driver component that enables privilege escalation through physical access attacks. The underlying issue occurs when multiple threads or processes attempt to access shared resources simultaneously without proper synchronization mechanisms, creating opportunities for malicious manipulation of system state during critical operations. The vulnerability specifically affects the Windows USB print driver subsystem where concurrent execution scenarios can lead to improper resource handling and state management issues that adversaries can exploit.
The technical flaw manifests in how the print driver manages shared resources during USB printer communication processes, particularly when multiple operations occur concurrently without adequate locking or synchronization primitives. This race condition allows an attacker with physical access to manipulate the timing and sequence of operations such that they can influence the driver's behavior to execute malicious code with elevated privileges. The vulnerability is classified as a race condition under CWE-362, which specifically addresses concurrent execution with improper synchronization leading to security weaknesses.
From an operational perspective, this vulnerability requires an attacker to have physical access to the target system, making it a privilege escalation vector that operates within the context of local attack scenarios. The attack surface is limited to systems running Windows with USB printer drivers installed and accessible through physical interaction. The impact extends beyond simple privilege escalation as it can provide attackers with elevated system-level access that enables further exploitation and persistence within the compromised environment.
The vulnerability's exploitation potential is enhanced by the fact that it operates on a physical attack vector, meaning that traditional network-based security controls may not prevent its execution. Attackers typically leverage this weakness by manipulating USB printer connections or through direct hardware manipulation to trigger the race condition during driver operations. This type of attack aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and specifically addresses local privilege escalation techniques that exploit system-level flaws.
Mitigation strategies should focus on both immediate patching and operational controls. Microsoft has released security updates addressing this specific vulnerability in the USB print driver components, making timely patch deployment essential for preventing exploitation. Organizations should also implement physical security measures to limit unauthorized access to systems, particularly those with USB ports that could be exploited through this attack vector. Additional defensive measures include monitoring for unusual USB device connections and implementing strict access controls for printer driver installations and modifications.
The vulnerability demonstrates the importance of proper synchronization mechanisms in system-level drivers, particularly those handling external device communications. It highlights how seemingly benign concurrent operations can create security weaknesses when not properly managed through appropriate locking mechanisms or atomic operations. System administrators should prioritize regular security updates and maintain awareness of emerging vulnerabilities affecting core operating system components like print drivers that handle physical device interactions. This type of vulnerability also underscores the need for comprehensive testing of driver code under concurrent execution scenarios to identify potential race conditions before they can be exploited in real-world environments.