CVE-2025-24066 is a heap-based buffer overflow vulnerability classified under CWE-122, affecting Microsoft Windows 10 Version 1507 (build 10.0.10240.0). The vulnerability resides in kernel-mode drivers, which handle core operating system functions with high privileges. The flaw arises from improper memory management in the kernel, allowing an attacker with local authorized access to trigger a buffer overflow on the heap. Exploiting this vulnerability enables the attacker to execute arbitrary code in kernel mode, effectively elevating their privileges from a limited user context to SYSTEM level. The CVSS 3.1 base score of 7.8 indicates a high severity, with attack vector local (AV:L), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), and impacting confidentiality, integrity, and availability at a high level (C:H/I:H/A:H). Although no public exploits have been reported, the vulnerability's nature makes it a critical risk for environments still running this early Windows 10 version, which is no longer supported and lacks security updates. The absence of patches at the time of publication necessitates urgent mitigation planning. The vulnerability could be leveraged by attackers who have gained initial access through other means, such as phishing or insider threats, to escalate privileges and gain full control over affected systems.

For European organizations, the impact of CVE-2025-24066 is significant, particularly for those still operating legacy Windows 10 Version 1507 systems. Successful exploitation allows attackers to bypass local security controls and gain SYSTEM-level privileges, potentially leading to full system compromise, data theft, or disruption of critical services. This can affect confidentiality by exposing sensitive data, integrity by allowing unauthorized code execution or system modifications, and availability by causing system crashes or denial of service. Sectors such as government, finance, healthcare, and critical infrastructure are especially at risk due to the sensitive nature of their data and the criticality of their operations. The local attack vector means that attackers must already have some level of access, but once achieved, the vulnerability facilitates lateral movement and privilege escalation within networks. Given the lack of known exploits, the immediate risk is moderate, but the potential for future exploitation remains high, especially if attackers develop reliable exploit code. The outdated nature of the affected OS version also suggests that organizations not maintaining up-to-date systems are more vulnerable, increasing the attack surface in European enterprises.

To mitigate CVE-2025-24066, European organizations should first identify any systems running Windows 10 Version 1507 (build 10.0.10240.0) through comprehensive asset inventory and endpoint management tools. Since no patches are currently available, the primary recommendation is to upgrade affected systems to a supported and fully patched version of Windows 10 or later, which addresses this vulnerability and other security issues. Implement strict local access controls and limit user privileges to the minimum necessary to reduce the risk of local exploitation. Employ endpoint detection and response (EDR) solutions to monitor for suspicious activity indicative of privilege escalation attempts. Network segmentation can help contain potential breaches by restricting lateral movement. Additionally, enforce strong authentication mechanisms and regularly audit local accounts and installed software to detect unauthorized changes. Once Microsoft releases an official patch, prioritize its deployment in all affected environments. Finally, conduct user awareness training to reduce the likelihood of initial compromise that could lead to exploitation of this vulnerability.