CVE-2025-50167 is a race condition vulnerability classified under CWE-362 affecting Microsoft Windows 10 Version 1507 (build 10.0.10240.0), specifically within the Hyper-V virtualization component. The vulnerability stems from improper synchronization during concurrent execution involving shared resources, which can lead to a race condition. This flaw allows an attacker with local authorized access to exploit the timing issue to elevate their privileges on the affected system. The vulnerability does not require user interaction but does require the attacker to have some level of local privileges already. The CVSS v3.1 base score is 7.0, reflecting high severity with impacts on confidentiality, integrity, and availability. The attack vector is local, with high attack complexity and low privileges required. The vulnerability is unpatched as of the publication date (August 12, 2025), and no known exploits have been observed in the wild. The race condition could allow an attacker to execute code or commands with elevated privileges, potentially leading to full system compromise. The vulnerability affects a legacy Windows 10 version, which may still be in use in some enterprise environments, especially those relying on Hyper-V for virtualization. Given the nature of race conditions, exploitation may be non-trivial but can be automated by skilled attackers. The lack of patches increases the urgency for mitigation and monitoring.

The primary impact of CVE-2025-50167 is local privilege escalation, which can allow an attacker to gain higher system privileges than initially granted. This can lead to unauthorized access to sensitive data, modification or deletion of critical system files, and disruption of system availability. In environments using Hyper-V for virtualization, successful exploitation could compromise virtual machines or the host system, potentially affecting multiple workloads. The confidentiality, integrity, and availability of affected systems are all at risk. Organizations with legacy Windows 10 Version 1507 systems, especially those in critical infrastructure, government, or enterprise environments relying on Hyper-V, face increased risk of targeted attacks. Although exploitation complexity is high and no public exploits are known, the vulnerability could be leveraged in multi-stage attacks or combined with other vulnerabilities. The lack of a patch means the vulnerability remains a persistent risk until addressed by Microsoft or mitigated by other means.

1. Upgrade affected systems to a supported and patched version of Windows 10 or later, as Windows 10 Version 1507 is legacy and no patches are currently available for this version. 2. If Hyper-V is not required, disable the Hyper-V feature to reduce the attack surface. 3. Restrict local access to trusted users only, employing strict access controls and monitoring for unusual local activity. 4. Implement application whitelisting and endpoint detection and response (EDR) solutions to detect and prevent suspicious privilege escalation attempts. 5. Regularly audit and monitor system logs for signs of race condition exploitation or privilege escalation attempts. 6. Employ least privilege principles to limit the permissions of local users and services. 7. Prepare incident response plans specifically addressing privilege escalation scenarios. 8. Stay informed on Microsoft security advisories for updates or patches addressing this vulnerability and apply them promptly once available.