CVE-2025-54102 is a use-after-free vulnerability classified under CWE-416 found in the Windows Connected Devices Platform Service on Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability arises when the service improperly manages memory, freeing an object while it is still in use, which can lead to execution of arbitrary code with elevated privileges. An authorized attacker with local access can exploit this flaw to escalate their privileges from a lower-privileged account to SYSTEM level, thereby gaining full control over the affected system. The vulnerability does not require user interaction, and the attack complexity is low, meaning an attacker with legitimate access can reliably exploit it. The CVSS v3.1 base score is 7.8, reflecting high severity due to the combined impact on confidentiality, integrity, and availability. Although no public exploits have been reported yet, the vulnerability's nature makes it a significant threat, especially in environments where Windows 10 1809 remains in use. The lack of available patches at the time of publication necessitates proactive mitigation strategies. The Windows Connected Devices Platform Service is integral to device communication and management, so exploitation could disrupt critical system functions or enable persistent unauthorized access.

For European organizations, this vulnerability poses a significant risk, particularly for those still operating legacy Windows 10 Version 1809 systems due to compatibility or operational constraints. Successful exploitation can lead to full system compromise, allowing attackers to access sensitive data, manipulate system configurations, or disrupt services. This is especially critical for sectors such as finance, healthcare, government, and critical infrastructure, where confidentiality and system integrity are paramount. The local attack vector limits remote exploitation but increases risk in environments with many users or shared workstations. The absence of user interaction requirements means that once local access is gained, privilege escalation can be automated or performed stealthily. This could facilitate lateral movement within networks, increasing the scope of impact. The vulnerability also threatens availability by potentially causing system crashes or service disruptions through memory corruption. European organizations with strict data protection regulations (e.g., GDPR) face compliance risks if breaches occur due to this vulnerability.

Given the absence of an official patch at the time of analysis, European organizations should adopt a layered mitigation approach. First, they should inventory and identify all systems running Windows 10 Version 1809 to assess exposure. Where possible, upgrade affected systems to a supported Windows version with security updates. If upgrading is not immediately feasible, restrict local access to trusted personnel only, employing strict access controls and monitoring. Implement application whitelisting and endpoint detection and response (EDR) solutions to detect suspicious privilege escalation attempts. Regularly audit user privileges to minimize the number of accounts with local access rights. Employ network segmentation to limit lateral movement from compromised endpoints. Monitor system logs for unusual activity related to the Connected Devices Platform Service. Finally, maintain close communication with Microsoft for patch releases and apply updates promptly once available.