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 in Windows Management Services. The underlying issue, classified under CWE-908 (Use of Uninitialized Resource), occurs when the system accesses memory or resources that have not been properly initialized, potentially exposing sensitive data residing in those memory locations. This vulnerability can be exploited by an authorized attacker with local access and low privileges (PR:L), without requiring any user interaction (UI:N). The attack vector is local (AV:L), meaning remote exploitation is not feasible. The vulnerability affects confidentiality (C:H) but does not impact integrity (I:N) or availability (A:N). The scope remains unchanged (S:U), indicating the vulnerability affects only the vulnerable component without extending to other system components. The CVSS 3.1 vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C, reflecting a medium severity score of 5.5. No known exploits have been reported in the wild, and no official patches have been released yet. The vulnerability could allow attackers to extract sensitive information from memory, potentially leading to further attacks if combined with other vulnerabilities or misconfigurations. The flaw highlights the importance of proper resource initialization in system services to prevent unintended data leakage. Organizations running Windows 11 25H2 should monitor for updates and prepare to deploy patches promptly once available.

For European organizations, this vulnerability poses a risk primarily to confidentiality, as sensitive information could be disclosed locally by an authorized attacker with low privileges. This could include leakage of credentials, configuration data, or other sensitive information stored in memory by Windows Management Services. While the attack requires local access, insider threats or attackers who have gained limited footholds could exploit this vulnerability to escalate information gathering. Critical sectors such as finance, government, healthcare, and infrastructure that rely heavily on Windows 11 25H2 could face increased risk of data exposure. The lack of impact on integrity and availability limits the scope of damage, but confidentiality breaches can still lead to significant operational and reputational harm. The absence of known exploits reduces immediate risk, but the medium severity score and potential for information disclosure warrant proactive mitigation. Organizations with strict data protection requirements under GDPR must consider the implications of unauthorized data exposure and ensure compliance through timely remediation.

1. Enforce strict local access controls and limit the number of users with privileges sufficient to exploit this vulnerability. 2. Monitor and audit privileged user activities to detect suspicious behavior indicative of attempts to access Windows Management Services resources. 3. Implement application whitelisting and endpoint detection and response (EDR) solutions to identify anomalous local actions. 4. Prepare for patch deployment by tracking Microsoft security advisories related to Windows 11 25H2 and CVE-2025-59204. 5. Use virtualization or sandboxing for sensitive environments to reduce the risk of local exploitation. 6. Educate system administrators and users with elevated privileges about the risks of local exploitation and the importance of maintaining secure access practices. 7. Employ memory protection mechanisms and security features such as Credential Guard where applicable to reduce the impact of memory disclosure vulnerabilities. 8. Regularly review and update security policies to minimize the attack surface related to local privilege exploitation.