CVE-2025-59192 is a buffer over-read vulnerability classified under CWE-126 found in the Storport.sys driver of Microsoft Windows 10 Version 1809 (build 17763.0). Storport.sys is a kernel-mode driver responsible for storage port driver functions, interfacing with storage hardware. The vulnerability allows an authorized local attacker to read beyond the intended buffer boundaries, potentially leading to memory corruption or disclosure of sensitive information. This flaw can be leveraged to elevate privileges locally, granting the attacker higher system rights than initially permitted. The attack vector requires local access with low complexity and no user interaction, making it feasible for insiders or malware with limited privileges to exploit. The vulnerability impacts confidentiality, integrity, and availability, as elevated privileges can lead to full system compromise. Although no exploits are currently known in the wild and no patches have been released at the time of publication, the vulnerability is rated high severity with a CVSS v3.1 score of 7.8. The absence of patches necessitates proactive mitigation. The vulnerability affects only Windows 10 Version 1809, a legacy operating system version that has reached or is near end-of-support, increasing risk for organizations that have not upgraded. Attackers exploiting this vulnerability could bypass security controls, install persistent malware, or disrupt system operations.

For European organizations, the impact of CVE-2025-59192 is significant, particularly for those still operating Windows 10 Version 1809 in production environments. Successful exploitation can lead to local privilege escalation, enabling attackers to gain administrative control over affected systems. This can result in unauthorized access to sensitive data, disruption of critical services, and deployment of further malware or ransomware. Sectors such as government, healthcare, finance, and critical infrastructure that rely on legacy Windows 10 systems are at heightened risk. The vulnerability's ability to compromise confidentiality, integrity, and availability could lead to data breaches, operational downtime, and regulatory non-compliance under GDPR. Since the vulnerability requires local access, insider threats or compromised endpoints are primary concerns. The lack of available patches increases exposure time, necessitating immediate risk management. Additionally, the potential for lateral movement within networks after privilege escalation could amplify the threat's impact across European enterprises.

Given the absence of an official patch at the time of disclosure, European organizations should implement the following specific mitigations: 1) Prioritize upgrading affected systems from Windows 10 Version 1809 to a supported, patched Windows version to eliminate the vulnerability. 2) Restrict local access to critical systems by enforcing strict access controls and using least privilege principles to minimize the number of users who can log in locally. 3) Employ application whitelisting and endpoint detection and response (EDR) solutions to detect and block suspicious activities indicative of privilege escalation attempts. 4) Monitor system logs and security event data for anomalous behavior related to Storport.sys or privilege escalation indicators. 5) Harden systems by disabling unnecessary services and drivers where feasible to reduce the attack surface. 6) Conduct user awareness training to reduce insider threat risks and ensure rapid reporting of suspicious activity. 7) Prepare incident response plans specifically addressing local privilege escalation scenarios. 8) Once Microsoft releases a patch, deploy it promptly following testing to remediate the vulnerability definitively.