CVE-2024-38065 is a heap-based buffer overflow vulnerability classified under CWE-122, impacting Microsoft Windows 10 Version 1809 (build 10.0.17763.0). The vulnerability specifically targets the Secure Boot security feature, allowing an attacker to bypass protections designed to ensure only trusted software is loaded during system startup. Exploitation of this vulnerability can lead to arbitrary code execution with high impact on confidentiality, integrity, and availability of the affected system. The CVSS 3.1 vector indicates the attack requires physical proximity (AV:P), no privileges (PR:N), and no user interaction (UI:N), making it a local attack that can be performed without authentication. The vulnerability is rated medium severity with a CVSS score of 6.8, reflecting the balance between its impactful consequences and the limited attack vector. No public exploits or active exploitation have been reported yet. The lack of available patches at the time of publication means affected organizations must rely on interim mitigations and plan for updates. This vulnerability is particularly concerning because Secure Boot is a foundational security mechanism that prevents unauthorized firmware and bootloaders from running, so bypassing it undermines system trust at a fundamental level. Organizations running Windows 10 Version 1809, especially in environments where physical access cannot be tightly controlled, are at risk.

The impact of CVE-2024-38065 on European organizations is significant due to the potential for complete system compromise through Secure Boot bypass. Confidentiality, integrity, and availability of systems can be fully undermined, allowing attackers to execute arbitrary code at a low privilege level without user interaction. This could lead to persistent malware infections, unauthorized access to sensitive data, and disruption of critical services. European enterprises and public sector entities that still operate Windows 10 Version 1809, particularly in sectors such as finance, healthcare, manufacturing, and critical infrastructure, face heightened risks. The physical proximity requirement limits remote exploitation but does not eliminate risk in environments with shared physical access or insider threats. The absence of known exploits in the wild provides a window for mitigation, but delayed patching or continued use of legacy systems could expose organizations to future attacks. The Secure Boot bypass also weakens the overall security posture, potentially facilitating further attacks or persistence mechanisms.

1. Prioritize upgrading affected systems from Windows 10 Version 1809 to a supported and patched Windows version to eliminate exposure to this vulnerability. 2. Until patches are available, enforce strict physical security controls to prevent unauthorized physical access to devices, including locked server rooms and restricted access policies. 3. Implement endpoint detection and response (EDR) solutions capable of detecting anomalous behavior indicative of exploitation attempts targeting Secure Boot or boot processes. 4. Use hardware-based security features such as TPM (Trusted Platform Module) and ensure Secure Boot is enabled and properly configured to reduce attack surface. 5. Conduct regular audits of device firmware and bootloader integrity to detect unauthorized modifications. 6. Educate IT staff and security teams about this vulnerability and monitor vendor advisories for patch releases. 7. Employ network segmentation to isolate legacy systems and limit lateral movement in case of compromise. 8. Maintain up-to-date backups and incident response plans tailored to firmware and boot-level attacks.