CVE-2025-62213 is a use-after-free vulnerability classified under CWE-416, found in the Windows Ancillary Function Driver for WinSock component of Microsoft Windows 10 Version 1809 (build 17763.0). The flaw arises when the driver improperly manages memory, leading to a use-after-free condition that can be exploited by an authorized local attacker to elevate privileges. This vulnerability does not require user interaction but does require the attacker to have low-level privileges on the system. The attack complexity is high, meaning exploitation is non-trivial and likely requires detailed knowledge of the system internals. Successful exploitation can lead to full compromise of the affected system by allowing the attacker to execute arbitrary code with elevated privileges, thereby impacting confidentiality, integrity, and availability of the system. No public exploits are currently known, and no patches have been released at the time of publication, increasing the urgency for organizations to monitor for updates. The vulnerability is rated with a CVSS v3.1 score of 7.0, reflecting its high severity. The flaw specifically targets Windows 10 Version 1809, which is an older release, but still in use in many enterprise environments. The Ancillary Function Driver for WinSock is a critical component handling network socket operations, making this vulnerability particularly dangerous as it could be leveraged to bypass security controls and gain system-level access.

For European organizations, the impact of CVE-2025-62213 can be significant, especially for those still operating legacy Windows 10 Version 1809 systems. Successful exploitation allows attackers to escalate privileges locally, potentially leading to full system compromise. This could result in unauthorized access to sensitive data, disruption of critical services, and the deployment of further malware or ransomware. Sectors such as finance, healthcare, government, and critical infrastructure are particularly at risk due to the high value of their data and services. The vulnerability’s requirement for local access limits remote exploitation but increases the risk from insider threats or attackers who have already gained foothold through other means. The absence of a patch at the time of disclosure means organizations must rely on compensating controls to mitigate risk. The overall impact includes potential data breaches, operational downtime, and reputational damage, which are critical concerns for European entities bound by strict data protection regulations like GDPR.

1. Prioritize upgrading or patching Windows 10 Version 1809 systems as soon as Microsoft releases a security update addressing CVE-2025-62213. 2. Implement strict local access controls and limit user privileges to the minimum necessary to reduce the risk of local exploitation. 3. Use application whitelisting and endpoint detection and response (EDR) solutions to monitor and block suspicious activities related to privilege escalation attempts. 4. Conduct regular audits of user accounts and permissions to identify and remove unnecessary administrative rights. 5. Employ network segmentation to isolate critical systems and reduce the attack surface for lateral movement. 6. Educate users about the risks of local privilege escalation and enforce policies against unauthorized software installation or execution. 7. Monitor security advisories from Microsoft and threat intelligence sources for updates or emerging exploit techniques. 8. Consider upgrading to a supported and more recent Windows version to benefit from ongoing security improvements and support.