CVE-2025-24067 is a heap-based buffer overflow vulnerability identified in the Microsoft Streaming Service component of Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability is classified under CWE-122, indicating improper handling of memory buffers leading to overflow conditions on the heap. The flaw allows an attacker with authorized local access to the system to trigger a buffer overflow, which can corrupt memory and enable escalation of privileges to SYSTEM level. The CVSS 3.1 base score is 7.8, reflecting high severity due to the impact on confidentiality, integrity, and availability, combined with relatively low attack complexity and no requirement for user interaction. The attacker must have some level of privileges already (PR:L), but no user interaction is needed (UI:N), and the scope remains unchanged (S:U). Although no public exploits are known at this time, the vulnerability poses a significant risk in environments where Windows 10 Version 1809 is still operational. The absence of a patch link indicates that a fix may not yet be publicly available, increasing the urgency for organizations to monitor updates from Microsoft. The vulnerability could be exploited to gain SYSTEM privileges, potentially allowing full control over the affected system, installation of persistent malware, or lateral movement within a network.

For European organizations, this vulnerability presents a critical risk especially in sectors where Windows 10 Version 1809 remains deployed, such as manufacturing, healthcare, and government entities with legacy systems. Successful exploitation could lead to full system compromise, exposing sensitive data and disrupting operations. The elevation of privileges could facilitate deployment of ransomware or other malware, impacting availability and causing significant financial and reputational damage. Since the attack requires local access, insider threats or compromised user accounts pose a particular risk. The vulnerability also threatens the integrity of systems by enabling unauthorized code execution and potential persistence mechanisms. Given the widespread use of Windows 10 in Europe and the presence of critical infrastructure relying on older OS versions, the impact could be substantial if exploited at scale.

Organizations should prioritize upgrading from Windows 10 Version 1809 to a more recent, supported version of Windows 10 or Windows 11 where this vulnerability is not present. Until patches are released, restrict local access to systems running the affected version by enforcing strict access controls and monitoring for unusual activity related to the Microsoft Streaming Service. Employ application whitelisting and endpoint detection and response (EDR) tools to detect exploitation attempts. Regularly audit user privileges to minimize the number of authorized users who could exploit this vulnerability. Network segmentation can limit the spread of an attacker who gains elevated privileges. Stay informed through official Microsoft security advisories and apply patches immediately upon release. Additionally, consider disabling or restricting the Microsoft Streaming Service if it is not essential to business operations to reduce the attack surface.