CVE-2025-24063 is a heap-based buffer overflow vulnerability identified in the Windows Kernel component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability is classified under CWE-122, which pertains to improper handling of memory buffers leading to overflow conditions. Specifically, the flaw allows an authorized local attacker—meaning one with some level of legitimate access to the system—to exploit the vulnerability to execute a privilege escalation attack. By triggering the heap overflow in the kernel, the attacker can potentially execute arbitrary code with elevated privileges, compromising the confidentiality, integrity, and availability of the affected system. The vulnerability does not require user interaction but does require local access with limited privileges. The CVSS v3.1 base score is 7.8 (high severity), reflecting the significant impact on confidentiality, integrity, and availability, combined with relatively low attack complexity and the need for only limited privileges. No known exploits are currently reported in the wild, and no patches or mitigation links have been provided yet. Given the kernel-level nature of the vulnerability, exploitation could lead to full system compromise, allowing attackers to bypass security controls, install persistent malware, or disrupt system operations.

For European organizations, this vulnerability poses a serious risk, especially for those still operating legacy systems or environments running Windows 10 Version 1809. The ability for a local attacker to escalate privileges can lead to insider threats or lateral movement within corporate networks. Critical infrastructure sectors, financial institutions, healthcare providers, and government agencies could be particularly impacted due to the sensitive nature of their data and the reliance on Windows-based systems. The compromise of kernel integrity can undermine endpoint security solutions, making detection and remediation more difficult. Additionally, the lack of a patch at the time of disclosure increases the window of exposure. Organizations with remote or hybrid workforces may face increased risk if endpoint devices are not updated or adequately protected, as attackers could leverage local access through compromised user accounts or social engineering. The potential for high-impact outcomes such as data breaches, ransomware deployment, or operational disruption underscores the need for immediate attention to this vulnerability.

Given the absence of an official patch, European organizations should implement layered mitigation strategies. First, restrict local access to systems running Windows 10 Version 1809 by enforcing strict access controls and minimizing the number of users with local login privileges. Employ application whitelisting and endpoint detection and response (EDR) solutions capable of monitoring and blocking suspicious kernel-level activities. Use virtualization-based security features available in Windows 10 to isolate critical processes and reduce attack surface. Regularly audit and monitor system logs for unusual behavior indicative of privilege escalation attempts. Where feasible, accelerate migration to supported and updated Windows versions with active security support. Implement network segmentation to limit lateral movement from compromised endpoints. Finally, prepare incident response plans specifically addressing privilege escalation scenarios to enable rapid containment and remediation once a vulnerability exploit is detected.