CVE-2025-50155 is a vulnerability classified under CWE-843 (Access of Resource Using Incompatible Type, or type confusion) affecting Microsoft Windows 10 Version 1507 (build 10240). The flaw exists in the Windows Push Notifications service, where the system improperly handles resource types, leading to type confusion. This can cause memory corruption, enabling an attacker with authorized local access to escalate privileges. The attacker does not require user interaction and can exploit the vulnerability with low complexity, given they already have some level of access (PR:L). The vulnerability impacts confidentiality, integrity, and availability (all rated high), as it allows unauthorized code execution at elevated privileges. The CVSS v3.1 base score is 7.8, reflecting the high impact and relatively low attack complexity. No public exploits or patches are currently documented, but the vulnerability is published and should be addressed promptly. The affected version is the initial release of Windows 10, which is largely superseded but may still be present in legacy or specialized environments. The vulnerability's exploitation could allow attackers to bypass security controls, install persistent malware, or disrupt system operations. The lack of user interaction requirement and the local attack vector suggest that attackers need initial foothold but can then leverage this flaw to gain full system control.

The primary impact of CVE-2025-50155 is local privilege escalation, enabling attackers with limited access to gain SYSTEM-level privileges. This can lead to complete system compromise, including the ability to install persistent malware, disable security mechanisms, access sensitive data, and disrupt system availability. Organizations running Windows 10 Version 1507, especially in environments with multiple users or where local access controls are weak, face significant risk. Legacy systems in critical infrastructure, industrial control, or government sectors may be particularly vulnerable due to slower patch cycles. The vulnerability could facilitate lateral movement within networks, increasing the scope of compromise. Although no known exploits are currently active, the high severity and ease of exploitation once local access is obtained make this a critical concern for affected environments. The impact extends to confidentiality, integrity, and availability, potentially affecting business continuity and data protection compliance.

1. Upgrade affected systems from Windows 10 Version 1507 to a supported and fully patched version of Windows 10 or later to eliminate the vulnerability. 2. If upgrading is not immediately possible, restrict local access to affected systems by enforcing strict user account controls and limiting administrative privileges. 3. Implement application whitelisting and endpoint detection and response (EDR) solutions to monitor for suspicious activity related to Windows Push Notifications or privilege escalation attempts. 4. Regularly audit and monitor logs for unusual behavior indicative of exploitation attempts, focusing on local privilege escalation indicators. 5. Disable or restrict Windows Push Notifications service where feasible in high-security environments to reduce attack surface. 6. Educate system administrators and users about the risks of local privilege escalation and the importance of maintaining updated systems. 7. Maintain a robust patch management process to quickly apply security updates once patches become available from Microsoft. 8. Employ network segmentation to limit the impact of compromised systems and prevent lateral movement.