CVE-2025-30385 is a use-after-free vulnerability classified under CWE-416 found in the Windows Common Log File System Driver on Windows 10 Version 1507 (build 10.0.10240.0). This flaw arises when the driver improperly manages memory, freeing an object while it is still in use, which can lead to execution of arbitrary code by an attacker with authorized local access. The vulnerability allows privilege escalation, enabling attackers to gain SYSTEM-level privileges from a lower privileged account. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction required. Although no exploits have been reported in the wild yet, the vulnerability is critical for legacy systems that have not been updated. The lack of available patches at the time of disclosure increases the urgency for mitigation through system upgrades or workarounds. This vulnerability is particularly dangerous because it can be leveraged to bypass security controls and gain persistent elevated access on affected systems.

The primary impact of CVE-2025-30385 is local privilege escalation, allowing attackers with authorized access to elevate their privileges to SYSTEM level. This can lead to full system compromise, enabling attackers to install malware, access sensitive data, disable security controls, and disrupt system availability. Organizations running Windows 10 Version 1507, especially those in critical infrastructure, government, and enterprise environments, face increased risk of insider threats or lateral movement by attackers who gain initial footholds. The vulnerability compromises confidentiality, integrity, and availability of affected systems, potentially leading to data breaches, operational disruption, and loss of trust. Since the affected version is an early Windows 10 release, systems that have not been updated remain vulnerable, increasing the attack surface for adversaries targeting legacy environments.

1. Upgrade affected systems to a supported and fully patched version of Windows 10 or later to eliminate the vulnerability. 2. If immediate upgrade is not possible, implement strict access controls to limit local user privileges and reduce the number of users with local access. 3. Employ application whitelisting and endpoint detection and response (EDR) solutions to detect and block suspicious privilege escalation attempts. 4. Monitor system logs and security events for unusual activity related to the Common Log File System Driver or privilege escalation indicators. 5. Disable or restrict use of legacy Windows 10 Version 1507 systems in critical environments until patched or upgraded. 6. Follow Microsoft security advisories for any forthcoming patches or workarounds specific to this vulnerability. 7. Conduct regular vulnerability assessments and penetration testing to identify and remediate privilege escalation vectors.