CVE-2025-54092 is a race condition vulnerability classified under CWE-362, affecting the Hyper-V virtualization component in Microsoft Windows 10 Version 1809 (build 17763.0). The flaw arises from improper synchronization when multiple threads or processes concurrently access shared resources within Hyper-V, leading to a race condition. This improper synchronization can be exploited by an attacker with local authorized access to escalate privileges on the system. The vulnerability does not require user interaction and has a low attack complexity, but it does require the attacker to already have some level of local privileges. Successful exploitation can compromise confidentiality, integrity, and availability of the system by allowing the attacker to execute code with elevated privileges, potentially gaining SYSTEM-level access. The vulnerability was reserved in July 2025 and published in September 2025, with no known exploits in the wild at the time of publication. No official patches have been linked yet, indicating that remediation may still be pending. The CVSS v3.1 base score is 7.8, reflecting high severity due to the combination of local privilege escalation potential and significant impact on system security. Hyper-V is widely used in enterprise environments for virtualization, making this vulnerability particularly relevant for organizations relying on Windows 10 1809 for virtual machine hosting or development environments. The vulnerability underscores the importance of proper synchronization mechanisms in concurrent execution contexts within system-level components like Hyper-V.

For European organizations, the impact of CVE-2025-54092 is significant, especially for those using Windows 10 Version 1809 with Hyper-V enabled in production or development environments. Privilege escalation vulnerabilities allow attackers who have gained limited local access—through phishing, insider threats, or other means—to elevate their privileges to SYSTEM level, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, disruption of critical services, and lateral movement within networks. Organizations in sectors such as finance, healthcare, government, and critical infrastructure, which often use virtualization for workload isolation and testing, are particularly at risk. The lack of a patch at the time of disclosure increases the window of exposure. Additionally, compliance with European data protection regulations (e.g., GDPR) may be jeopardized if attackers exploit this vulnerability to access or exfiltrate personal data. The vulnerability's exploitation could also undermine trust in IT infrastructure and lead to costly incident response and remediation efforts.

1. Immediately inventory and identify all systems running Windows 10 Version 1809 with Hyper-V enabled to assess exposure. 2. Restrict local access to these systems to trusted administrators and users only, minimizing the risk of local attackers exploiting the vulnerability. 3. Monitor system logs and security event data for unusual privilege escalation attempts or suspicious Hyper-V activity. 4. Apply any forthcoming security patches from Microsoft as soon as they become available; subscribe to official Microsoft security advisories for updates. 5. Where possible, upgrade affected systems to a more recent and supported Windows version that does not contain this vulnerability, as Windows 10 1809 is an older release with limited support. 6. Implement application whitelisting and endpoint protection solutions that can detect and block unauthorized privilege escalation attempts. 7. Harden Hyper-V configurations by disabling unnecessary features and limiting virtual machine access rights. 8. Conduct regular security awareness training to reduce the risk of initial local compromise that could lead to exploitation. 9. Consider network segmentation to isolate critical systems running vulnerable versions to limit lateral movement. 10. Perform penetration testing and vulnerability assessments focused on privilege escalation vectors to validate defenses.