CVE-2025-59204 is a vulnerability identified in Microsoft Windows 11 Version 25H2 (build 10.0.26200.0) related to the use of an uninitialized resource within Windows Management Services. This vulnerability is classified under CWE-908, which involves the use of uninitialized resources that can lead to unintended behavior such as information disclosure. Specifically, an authorized attacker with local access and limited privileges can exploit this flaw to disclose sensitive information from the system memory or other protected resources. The vulnerability does not require user interaction and does not affect system integrity or availability, focusing solely on confidentiality. The CVSS v3.1 base score is 5.5 (medium severity), with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, indicating local attack vector, low complexity, privileges required but no user interaction, unchanged scope, and high confidentiality impact. No public exploits or patches are currently available, which suggests that organizations should be vigilant and prepare for remediation. The root cause is the failure to properly initialize resources before use in Windows Management Services, which can cause leakage of sensitive information to unauthorized local users. This vulnerability highlights the importance of secure coding practices and resource management in system services.

For European organizations, the primary impact of CVE-2025-59204 is the potential unauthorized disclosure of sensitive information by an attacker with local access and some privileges. This could lead to exposure of confidential data, including system or user information, which may facilitate further attacks or data breaches. Since the vulnerability does not affect system integrity or availability, the immediate operational disruption risk is low. However, the confidentiality breach could have regulatory and compliance implications under GDPR and other data protection laws, especially if sensitive personal or corporate data is exposed. Organizations with shared workstations, remote desktop environments, or environments where multiple users have local access are at higher risk. Critical sectors such as finance, healthcare, and government could face increased risk if attackers leverage this vulnerability to gain intelligence for more sophisticated attacks. The lack of available patches means organizations must rely on compensating controls until a fix is released.

1. Restrict local access to systems running Windows 11 Version 25H2 to trusted and authorized personnel only, minimizing the attack surface. 2. Implement strict privilege management to ensure users have only the minimum necessary permissions, reducing the likelihood of exploitation by low-privilege users. 3. Monitor and audit local user activities and Windows Management Services logs for unusual or unauthorized access patterns that might indicate exploitation attempts. 4. Employ endpoint detection and response (EDR) solutions capable of detecting anomalous behavior related to information disclosure or resource misuse. 5. Prepare for rapid deployment of patches or updates from Microsoft once they become available by maintaining an up-to-date asset inventory and patch management process. 6. Consider isolating critical systems or using virtualization/containerization to limit the impact of local vulnerabilities. 7. Educate users about the risks of local privilege misuse and enforce policies that prevent unauthorized software installation or execution.