CVE-2025-55695 is a security vulnerability classified as CWE-125 (Out-of-bounds Read) found in the Windows WLAN Auto Config Service component of Microsoft Windows 11 Version 25H2 (build 10.0.26200.0). This vulnerability allows an attacker with authorized local access to the system to read memory outside the intended buffer boundaries. Such out-of-bounds reads can lead to disclosure of sensitive information stored in adjacent memory, potentially including credentials, cryptographic keys, or other confidential data. The flaw arises due to improper bounds checking in the WLAN Auto Config Service, which manages wireless network configurations and connectivity. Exploitation does not require user interaction and does not affect system integrity or availability, limiting the attack to confidentiality breaches. The CVSS v3.1 base score is 5.5, indicating a medium severity level, with attack vector local (AV:L), low attack complexity (AC:L), privileges required (PR:L), no user interaction (UI:N), and high impact on confidentiality (C:H). No public exploits or patches are currently available, but the vulnerability is officially published and recognized by Microsoft. This vulnerability is particularly relevant for environments where local user accounts may be compromised or where multiple users share systems, as it could facilitate lateral information gathering or privilege escalation preparation.

For European organizations, the primary impact of CVE-2025-55695 is the potential unauthorized disclosure of sensitive information from systems running Windows 11 Version 25H2. This could compromise confidentiality of wireless network credentials or other sensitive data held in memory by the WLAN Auto Config Service. Organizations relying heavily on wireless connectivity, such as enterprises with extensive Wi-Fi deployments, government agencies, and critical infrastructure operators, may face increased risk of information leakage. Although the vulnerability does not allow remote exploitation or direct system compromise, attackers with local access—such as disgruntled insiders, contractors, or malware with limited privileges—could leverage this flaw to gather intelligence for further attacks. This risk is heightened in shared workstation environments or where endpoint security controls are weak. The lack of known exploits in the wild reduces immediate threat but does not eliminate the risk of future exploitation. The medium severity rating suggests that while the vulnerability is not critical, it warrants timely attention to prevent potential data breaches and maintain compliance with data protection regulations such as GDPR.

To mitigate CVE-2025-55695, European organizations should implement the following specific measures: 1) Restrict local access to Windows 11 Version 25H2 systems by enforcing strict user account controls and limiting administrative privileges to trusted personnel only. 2) Employ endpoint detection and response (EDR) solutions to monitor for suspicious activities related to the WLAN Auto Config Service or unusual memory access patterns. 3) Harden wireless network configurations and ensure that sensitive credentials are stored securely, minimizing exposure in memory. 4) Isolate critical systems and enforce network segmentation to reduce the risk of lateral movement by attackers with local access. 5) Prepare for rapid deployment of official patches or updates from Microsoft once released, including testing in controlled environments to avoid operational disruptions. 6) Conduct regular security awareness training to highlight risks associated with local privilege misuse and insider threats. 7) Utilize application whitelisting and system integrity monitoring to detect unauthorized modifications or exploitation attempts. These targeted actions go beyond generic advice by focusing on controlling local access vectors and protecting wireless configuration data specifically.