CVE-2025-55695 is a medium severity vulnerability classified as CWE-125 (Out-of-bounds Read) found in the Windows WLAN Auto Config Service on Windows 11 Version 25H2 (build 10.0.26200.0). This vulnerability arises from improper bounds checking when handling data within the WLAN Auto Config Service, which manages wireless network configurations and connectivity. An authorized attacker with local privileges can exploit this flaw to read memory beyond the intended buffer boundaries, potentially disclosing sensitive information stored in adjacent memory areas. The vulnerability does not require user interaction and does not allow modification of data or disruption of service, limiting its impact to confidentiality breaches only. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) indicates that the attack vector is local, with low attack complexity, requiring privileges but no user interaction, and results in high confidentiality impact without affecting integrity or availability. No public exploits or active exploitation have been reported to date, but the presence of this vulnerability in a widely deployed OS version necessitates attention. The lack of an official patch at the time of reporting means organizations must implement interim mitigations and monitor for updates from Microsoft. The vulnerability's exploitation could allow attackers to extract sensitive wireless configuration data or other memory-resident secrets, which could be leveraged for further attacks or privilege escalation.

For European organizations, the primary impact is the potential disclosure of sensitive information from systems running Windows 11 Version 25H2, particularly those with multiple local users or where local access control is weak. Confidentiality breaches could expose wireless network credentials, configuration details, or other sensitive memory contents, increasing the risk of lateral movement or targeted attacks. Critical infrastructure, government agencies, and enterprises with stringent data protection requirements may face compliance risks if sensitive data is leaked. Since the vulnerability requires local privileges, remote exploitation is not feasible, reducing the risk for organizations with strong perimeter defenses but emphasizing the importance of endpoint security and user privilege management. The medium severity rating suggests that while the threat is not immediately critical, it could be leveraged as part of a multi-stage attack chain. Organizations relying heavily on wireless connectivity and those with shared workstation environments are particularly vulnerable. The absence of known exploits limits immediate risk but does not preclude future exploitation once details become public.

1. Apply official patches from Microsoft promptly once they are released for Windows 11 Version 25H2 to remediate the vulnerability. 2. Until patches are available, restrict local user privileges to the minimum necessary to reduce the risk of exploitation. 3. Implement strict access controls on endpoints, especially those in sensitive environments, to prevent unauthorized local access. 4. Monitor system logs and wireless service activity for unusual behavior indicative of exploitation attempts. 5. Use endpoint detection and response (EDR) tools to identify anomalous memory access patterns or privilege escalation attempts. 6. Educate users about the risks of local privilege abuse and enforce policies against unauthorized software installation or execution. 7. Consider network segmentation to isolate critical systems and limit lateral movement opportunities. 8. Regularly audit wireless configurations and credentials to detect unauthorized changes or disclosures. 9. Employ application whitelisting to prevent execution of unauthorized code that could exploit the vulnerability. 10. Stay informed through trusted cybersecurity advisories and update incident response plans accordingly.