CVE-2026-58598 in Windows
Summary
by MITRE • 07/17/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/17/2026
This vulnerability represents a classic race condition flaw in the Windows Backup Engine component that enables local privilege escalation through improper synchronization of concurrent operations. The core issue stems from insufficient coordination mechanisms when multiple processes or threads attempt to access shared resources simultaneously, creating temporal windows where malicious code can exploit the inconsistent state of system components. The vulnerability exists within the backup engine's handling of file system operations and registry modifications, where concurrent access patterns have not been properly synchronized to prevent unauthorized modifications.
The technical implementation involves a timing attack vector where an authorized local user can manipulate the execution flow of backup processes to gain elevated privileges. When multiple threads or processes attempt to modify shared resources such as configuration files, registry keys, or temporary storage locations, the lack of proper mutex locks or atomic operations creates opportunities for malicious interference. This race condition manifests when one process reads a resource state while another modifies it, leading to unpredictable behavior that attackers can leverage for privilege escalation. The flaw specifically impacts Windows operating systems where backup functionality is utilized and can be exploited through carefully crafted concurrent execution sequences.
The operational impact of this vulnerability extends beyond simple local privilege escalation, as it represents a significant security weakness in the Windows kernel's resource management architecture. Attackers can exploit this condition to elevate their privileges from standard user level to SYSTEM level access, enabling complete system compromise. The vulnerability is particularly dangerous because it requires minimal privileges to exploit and operates within legitimate system processes, making detection challenging for traditional security monitoring systems. This race condition creates a persistent threat vector that can be leveraged for data exfiltration, persistence establishment, or further lateral movement within compromised networks.
Mitigation strategies should focus on implementing proper synchronization mechanisms throughout the backup engine's codebase and addressing the underlying race condition through atomic operations and mutex locking. System administrators should apply the latest security patches from Microsoft that address this specific vulnerability in Windows Backup Engine components. Additionally, implementing least privilege principles and restricting local user access to backup functionality can reduce exploitation risk. The vulnerability aligns with CWE-362 which specifically addresses race conditions in concurrent programming, and maps to ATT&CK technique T1068 which covers local privilege escalation through system binary manipulation. Organizations should also consider monitoring for unusual backup process behavior and implementing application control measures to prevent unauthorized execution of modified backup components.