CVE-2024-30089 is a use-after-free vulnerability (CWE-416) identified in the Microsoft Streaming Service component of Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability arises when the service improperly manages memory, allowing an attacker to reference memory after it has been freed. Exploitation requires local access with low privileges and does not require user interaction, making it a potent elevation of privilege vector. Successful exploitation can lead to arbitrary code execution with elevated privileges, compromising system confidentiality, integrity, and availability. The vulnerability was reserved in March 2024 and published in June 2024, with no known exploits in the wild at the time of disclosure. The CVSS v3.1 score is 7.8, indicating high severity, with attack vector local, low attack complexity, low privileges required, no user interaction, and impacts rated high across confidentiality, integrity, and availability. The vulnerability affects legacy Windows 10 1809 systems, which are still in use in some enterprise environments, particularly where upgrading is delayed due to compatibility or operational constraints. No official patches were linked at the time of disclosure, suggesting organizations must monitor for updates or apply mitigations proactively.

For European organizations, the impact of CVE-2024-30089 is significant, especially for those still operating Windows 10 Version 1809 in critical sectors such as government, finance, healthcare, and industrial control systems. An attacker with local access could escalate privileges to SYSTEM level, enabling full control over affected machines. This could lead to data breaches, disruption of services, and lateral movement within networks. The compromise of confidentiality, integrity, and availability could result in loss of sensitive data, unauthorized changes to system configurations, and denial of service conditions. Given the lack of known exploits currently, the threat is moderate but could increase rapidly once exploit code becomes available. Organizations with legacy systems or limited patch management capabilities face heightened risk. The vulnerability also poses a risk to supply chain security if exploited on development or operational technology endpoints.

1. Upgrade affected systems to a supported and fully patched Windows version beyond 1809, ideally Windows 10 21H2 or later, or Windows 11 where feasible. 2. If upgrading is not immediately possible, apply any official patches or security updates released by Microsoft as soon as they become available. 3. Restrict local access to systems running Windows 10 1809 by enforcing strict access controls and limiting administrative privileges. 4. Implement application whitelisting and endpoint detection and response (EDR) solutions to detect and block suspicious privilege escalation attempts. 5. Monitor system logs and security alerts for unusual activity indicative of exploitation attempts, such as unexpected process launches or memory corruption indicators. 6. Conduct regular vulnerability assessments and penetration testing focusing on privilege escalation vectors. 7. Educate IT staff and users about the risks of local privilege escalation vulnerabilities and the importance of timely patching and system upgrades.