CVE-2025-53145 is a vulnerability classified under CWE-843 (Access of Resource Using Incompatible Type, or type confusion) affecting Microsoft Windows 10 Version 1809, specifically build 17763.0. The vulnerability exists within the Windows Message Queuing (MSMQ) component, which is used for asynchronous message communication between applications. The flaw allows an attacker who is authorized on the network and has limited privileges (PR:L) to exploit improper type handling in MSMQ, leading to execution of arbitrary code remotely (AV:N). The vulnerability does not require user interaction (UI:N) and affects confidentiality, integrity, and availability (C:H/I:H/A:H) of the system. The scope is unchanged (S:U), meaning the impact is limited to the vulnerable component and does not extend beyond the affected system. The vulnerability was reserved in June 2025 and published in August 2025, with no known exploits in the wild at the time of publication. The CVSS vector indicates low attack complexity (AC:L) and no user interaction, making exploitation feasible in environments where an attacker has network access and some level of authorization. The lack of available patches at the time of reporting increases the urgency for mitigation. MSMQ is often used in enterprise environments for reliable messaging, so exploitation could allow attackers to execute code remotely, potentially leading to full system compromise. The vulnerability is particularly relevant for organizations still running Windows 10 Version 1809, which is an older release but may remain in use due to legacy application dependencies or delayed upgrade cycles.

The impact of CVE-2025-53145 on European organizations can be significant, especially for enterprises and critical infrastructure operators still using Windows 10 Version 1809. Successful exploitation can lead to remote code execution with high privileges, allowing attackers to take full control of affected systems. This compromises the confidentiality of sensitive data, integrity of system operations, and availability of services relying on MSMQ. Given that MSMQ is used in various business-critical applications for message queuing and asynchronous processing, disruption or compromise could affect financial services, manufacturing, healthcare, and government operations. The vulnerability's network-based attack vector increases the risk for organizations with exposed MSMQ services or insufficient network segmentation. In Europe, where data protection regulations such as GDPR impose strict requirements on data security, exploitation could lead to regulatory penalties and reputational damage. Additionally, the lack of known exploits currently provides a window for proactive mitigation, but the high CVSS score indicates that once exploits emerge, the threat level will escalate rapidly.

To mitigate CVE-2025-53145, European organizations should take the following specific actions: 1) Immediately inventory and identify all systems running Windows 10 Version 1809 with MSMQ enabled. 2) Apply any official patches or security updates from Microsoft as soon as they become available; monitor Microsoft security advisories closely. 3) If patches are not yet available, restrict network access to MSMQ services by implementing firewall rules that limit inbound connections to trusted hosts only. 4) Disable MSMQ on systems where it is not required to reduce the attack surface. 5) For systems requiring MSMQ, consider network segmentation to isolate these systems from untrusted networks and limit lateral movement. 6) Plan and execute an upgrade strategy to move affected systems to supported Windows versions that receive regular security updates. 7) Monitor network traffic and system logs for unusual activity related to MSMQ, including unexpected message patterns or process executions. 8) Employ endpoint detection and response (EDR) tools to detect potential exploitation attempts. 9) Conduct user privilege reviews to ensure that only necessary accounts have access to MSMQ services. These targeted mitigations go beyond generic advice by focusing on MSMQ-specific controls and legacy OS management.