CVE-2025-62209 is a vulnerability identified in Microsoft Windows 10 Version 1809 (build 10.0.17763.0) affecting the Windows License Manager component. The issue involves CWE-532, which is the insertion of sensitive information into log files. Specifically, the Windows License Manager improperly logs sensitive data, which can include licensing information or other confidential details, into local log files accessible on the system. An attacker with authorized local access and limited privileges (PR:L) can read these logs to disclose sensitive information, potentially aiding further attacks or unauthorized data disclosure. The vulnerability does not require user interaction (UI:N) and does not affect system integrity or availability (I:N, A:N), but it has a high impact on confidentiality (C:H). The attack vector is local (AV:L), meaning the attacker must have some level of access to the affected system. The CVSS v3.1 base score is 5.5, indicating medium severity. No known exploits are currently reported in the wild, and no official patches have been linked yet, suggesting that mitigation currently relies on access control and operational security measures. This vulnerability highlights the risk of sensitive data leakage through improper logging practices, which can be exploited by insiders or attackers who have gained limited local access.

For European organizations, the primary impact of CVE-2025-62209 is the potential unauthorized disclosure of sensitive information stored in Windows License Manager logs. This could lead to exposure of licensing data or other confidential details that may facilitate further attacks or compliance violations, especially under GDPR and other data protection regulations. Organizations with shared or multi-user environments, such as public sector offices, educational institutions, and enterprises with local user accounts, are particularly vulnerable. While the vulnerability does not allow remote exploitation or system compromise directly, it increases the risk profile by leaking sensitive data to local attackers. This could undermine trust, lead to regulatory penalties, or assist attackers in lateral movement or privilege escalation. Legacy systems still running Windows 10 Version 1809 are at risk, and since this version is out of mainstream support, many organizations may lack timely patches, increasing exposure. The confidentiality breach could be critical in sectors handling sensitive personal or business data, such as finance, healthcare, and government.

1. Restrict access to log files generated by the Windows License Manager by enforcing strict file system permissions, ensuring only trusted administrators can read these logs. 2. Audit and minimize local user privileges to reduce the number of users who can access sensitive logs, applying the principle of least privilege. 3. Monitor and review local log file access patterns to detect any unauthorized attempts to read sensitive information. 4. Where possible, upgrade affected systems from Windows 10 Version 1809 to a supported and patched Windows version to eliminate the vulnerability. 5. Implement endpoint detection and response (EDR) solutions to identify suspicious local activities related to log file access. 6. Educate system administrators and users about the risks of local data exposure and the importance of securing local accounts. 7. If upgrading is not immediately feasible, consider disabling or limiting the Windows License Manager logging functionality if it does not impact business operations. 8. Maintain an inventory of systems running Windows 10 Version 1809 to prioritize remediation efforts.