CVE-2025-24044 is a use-after-free vulnerability classified under CWE-416 that affects the Windows 10 Version 1507 Win32 Kernel Subsystem. This flaw arises when the kernel improperly handles memory, freeing an object while it is still in use, which can be exploited by an authorized local attacker to execute arbitrary code with elevated privileges. The vulnerability does not require user interaction and has a low attack complexity, meaning an attacker with legitimate local access can reliably exploit it to gain SYSTEM-level privileges. The CVSS v3.1 base score of 7.8 reflects the high impact on confidentiality, integrity, and availability, as successful exploitation could allow full control over the affected system. The affected version, Windows 10 1507 (build 10.0.10240.0), is the initial release of Windows 10 from 2015 and is no longer supported by Microsoft, which complicates remediation. No public exploits or active exploitation have been reported yet, but the vulnerability is significant due to the critical nature of kernel-level privilege escalation. The lack of available patches means organizations must consider upgrading to later supported Windows versions or apply any out-of-band mitigations if provided. This vulnerability highlights the risks of running outdated operating systems in environments where local user access cannot be fully controlled or trusted.

For European organizations, the impact of CVE-2025-24044 can be severe, especially in sectors relying on legacy Windows 10 systems such as manufacturing, government, and critical infrastructure. Successful exploitation allows attackers to escalate privileges locally, potentially leading to full system compromise, data theft, sabotage, or lateral movement within networks. This can result in loss of sensitive information, disruption of services, and damage to organizational reputation. The vulnerability’s presence in an unsupported OS version increases risk since no official patches are available, forcing organizations to rely on system upgrades or compensating controls. Given the high confidentiality, integrity, and availability impact, attackers gaining elevated privileges could bypass security controls and deploy malware or ransomware, which is a significant concern for European entities under strict data protection regulations like GDPR. Additionally, the vulnerability could be leveraged in targeted attacks against high-value assets, making it a critical threat to national security and economic stability in Europe.

1. Immediate mitigation should focus on upgrading all affected systems from Windows 10 Version 1507 to a supported and fully patched Windows version, such as Windows 10 LTSC or Windows 11, to receive security updates. 2. Where upgrade is not immediately possible, restrict local user access to trusted personnel only and enforce the principle of least privilege to minimize the risk of exploitation. 3. Implement enhanced monitoring and logging of local privilege escalation attempts and kernel subsystem anomalies to detect potential exploitation attempts early. 4. Use application whitelisting and endpoint detection and response (EDR) solutions to prevent unauthorized code execution and lateral movement. 5. Conduct regular audits of user accounts and local administrator privileges to reduce the attack surface. 6. If available, apply any out-of-band patches or workarounds released by Microsoft or third parties addressing this specific vulnerability. 7. Educate IT staff about the risks of running unsupported OS versions and the importance of timely patching and upgrades. 8. Segment networks to isolate legacy systems and limit the impact of a potential compromise.