CVE-2024-30086 is a use-after-free vulnerability classified under CWE-416 affecting the Win32 Kernel Subsystem in Microsoft Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability allows an attacker with low privileges on a local system to execute code with elevated privileges by exploiting improper memory management in the kernel subsystem. The flaw arises when the system incorrectly handles memory objects, leading to a use-after-free condition that can be leveraged to execute arbitrary code or cause system instability. The CVSS v3.1 base score is 7.8, reflecting high severity due to its impact on confidentiality, integrity, and availability (all rated high). The attack vector is local (AV:L), requiring low attack complexity (AC:L) and low privileges (PR:L), but no user interaction (UI:N). The scope remains unchanged (S:U), meaning the vulnerability affects only the vulnerable component. Although no exploits are currently known in the wild, the vulnerability poses a significant risk to systems that remain unpatched. The lack of a patch link suggests that remediation may be pending or in progress. This vulnerability is particularly concerning because kernel-level privilege escalation can lead to full system compromise, bypassing security controls and potentially allowing attackers to install persistent malware or disrupt critical services.

For European organizations, the impact of CVE-2024-30086 can be substantial, especially for those still operating legacy Windows 10 Version 1809 systems. Successful exploitation can lead to unauthorized privilege escalation, allowing attackers to gain administrative control over affected machines. This can compromise sensitive data confidentiality, alter system integrity by installing malicious code or modifying system files, and disrupt availability through system crashes or denial-of-service conditions. Critical sectors such as finance, healthcare, government, and industrial control systems that rely on legacy Windows environments are particularly vulnerable. The local attack vector means that attackers need some form of initial access, which could be achieved through phishing, insider threats, or lateral movement within networks. The absence of user interaction lowers the barrier for exploitation once local access is obtained. Consequently, this vulnerability could facilitate further attacks, including ransomware deployment or espionage, impacting European organizations' operational continuity and regulatory compliance.

Organizations should prioritize upgrading or patching Windows 10 Version 1809 systems as soon as Microsoft releases an official security update addressing CVE-2024-30086. Until patches are available, mitigate risk by restricting local access to vulnerable systems, enforcing strict access controls, and monitoring for unusual privilege escalation attempts. Employ endpoint detection and response (EDR) solutions to detect suspicious kernel-level activities. Network segmentation can limit lateral movement opportunities for attackers who gain initial access. Additionally, organizations should review and harden user privilege assignments to minimize the number of accounts with local access rights. Regularly audit systems for outdated Windows versions and plan migration to supported versions to reduce exposure to legacy vulnerabilities. Implementing application whitelisting and kernel integrity monitoring can further reduce the risk of exploitation. Finally, maintain up-to-date backups and incident response plans to quickly recover from potential compromises.