CVE-2025-59192 is a buffer over-read vulnerability classified under CWE-126, found in the Storport.sys driver component of Microsoft Windows 10 Version 1809 (build 17763.0). The flaw arises due to improper bounds checking in the driver’s handling of certain memory buffers, which allows an attacker with authorized local access to read beyond the intended buffer limits. This can lead to privilege escalation by corrupting or leaking sensitive kernel memory, enabling the attacker to execute code with elevated privileges. The vulnerability requires local privileges (PR:L) but no user interaction (UI:N), and has a low attack complexity (AC:L). The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits are currently known, the vulnerability’s nature and severity make it a significant risk for environments running this outdated Windows version. The Storport.sys driver is critical for storage port operations, so exploitation could disrupt system stability and data integrity. The vulnerability was published on October 14, 2025, with no patches yet available, emphasizing the need for vigilance and interim mitigations. Given the age of Windows 10 1809, many organizations may have migrated, but legacy systems remain vulnerable. Attackers could leverage this flaw to gain system-level control, bypassing security controls and potentially deploying further malware or ransomware.

For European organizations, this vulnerability poses a substantial risk, particularly for those still operating legacy Windows 10 Version 1809 systems in critical infrastructure, government, finance, and industrial sectors. Successful exploitation could lead to full system compromise, exposing sensitive data, disrupting operations, and enabling lateral movement within networks. The high impact on confidentiality, integrity, and availability means that data breaches, system outages, and unauthorized administrative access are plausible outcomes. Since the vulnerability requires local access, insider threats or attackers who have already gained limited footholds could escalate privileges rapidly. This elevates the threat level for organizations with less stringent endpoint security or those allowing remote desktop or VPN access to vulnerable machines. The absence of known exploits currently reduces immediate risk but also means attackers may develop exploits in the near future, increasing urgency for mitigation. European entities with legacy Windows deployments or those in sectors targeted by advanced persistent threats (APTs) should consider this vulnerability a priority.

1. Apply Microsoft security updates immediately once they become available for Windows 10 Version 1809 systems. 2. If patches are not yet released, restrict local user access to vulnerable systems by enforcing strict access controls and limiting administrative privileges. 3. Implement application whitelisting and endpoint detection and response (EDR) solutions to monitor for anomalous behavior related to Storport.sys or privilege escalation attempts. 4. Disable or restrict remote access methods such as RDP or VPN on vulnerable endpoints unless absolutely necessary, and enforce multi-factor authentication (MFA). 5. Conduct thorough audits of systems running Windows 10 1809 to identify and prioritize remediation or upgrade to supported Windows versions. 6. Educate IT staff and users about the risks of local privilege escalation vulnerabilities and encourage prompt reporting of suspicious activity. 7. Use network segmentation to isolate legacy systems and limit potential lateral movement in case of compromise. 8. Monitor security advisories from Microsoft and threat intelligence sources for updates on exploit availability and mitigation guidance.