CVE-2025-53724 is a vulnerability classified under CWE-843 (Access of Resource Using Incompatible Type, also known as type confusion) affecting Microsoft Windows 10 Version 1809 (build 10.0.17763.0). The flaw exists in the Windows Push Notifications component, where improper handling of resource types allows an attacker with local privileges to access resources using incompatible types. This type confusion can lead to memory corruption, enabling privilege escalation from a low-privileged user context to higher privileges, potentially SYSTEM level. The vulnerability requires the attacker to have local access and some level of privileges (PR:L), but does not require user interaction (UI:N). The CVSS v3.1 score of 7.8 reflects high severity, with impacts on confidentiality, integrity, and availability (all rated high). The exploitability is considered low complexity (AC:L) and no known exploits are currently reported in the wild. The vulnerability was reserved in July 2025 and published in August 2025, with no patches currently linked, indicating that mitigation may require vendor updates or workarounds. This vulnerability is particularly critical for legacy systems still running Windows 10 Version 1809, which is out of mainstream support, increasing exposure risk. Attackers exploiting this flaw could execute arbitrary code with elevated privileges, compromising system security and potentially enabling further lateral movement or persistence.

For European organizations, the impact of CVE-2025-53724 is significant due to the potential for local attackers to escalate privileges and gain full control over affected systems. This can lead to unauthorized access to sensitive data, disruption of critical services, and deployment of further malicious payloads. Organizations in sectors such as government, finance, healthcare, and critical infrastructure are particularly at risk, as compromise could affect national security, financial stability, and public safety. The vulnerability undermines confidentiality by enabling unauthorized data access, integrity by allowing modification of system components, and availability by potentially causing system crashes or denial of service. Since Windows 10 Version 1809 is still in use in some enterprises due to legacy application dependencies, the risk remains relevant. The lack of current patches increases the window of exposure, making timely mitigation essential. Additionally, the vulnerability could be leveraged in targeted attacks or combined with other exploits to achieve broader network compromise within European organizations.

To mitigate CVE-2025-53724, European organizations should prioritize upgrading affected systems from Windows 10 Version 1809 to a supported and patched Windows version, as no official patches are currently linked for this vulnerability. Until upgrades are feasible, organizations should restrict local access to vulnerable systems by enforcing strict access controls and limiting administrative privileges. Employing application whitelisting and endpoint detection and response (EDR) solutions can help detect and prevent exploitation attempts. Monitoring system logs and security events for unusual activity related to Windows Push Notifications or privilege escalation attempts is critical. Network segmentation can isolate vulnerable systems to reduce lateral movement risk. Additionally, organizations should review and harden local user permissions, disable unnecessary services related to push notifications if possible, and ensure that all other security updates are applied to minimize attack surface. Maintaining an inventory of systems running Windows 10 Version 1809 will aid in targeted mitigation efforts. Finally, organizations should stay informed about vendor advisories for patches or workarounds addressing this vulnerability.