CVE-2025-53144 is a vulnerability classified under CWE-843 (Access of Resource Using Incompatible Type, commonly known as type confusion) affecting the Windows Message Queuing (MSMQ) service in Microsoft Windows 10 Version 1809 (build 17763.0). The vulnerability arises because MSMQ improperly handles resource types, allowing an attacker who is authorized on the network with low privileges to exploit this type confusion flaw to execute arbitrary code remotely. This means that an attacker can send specially crafted messages to the MSMQ service, causing it to interpret data incorrectly and execute malicious payloads. The vulnerability does not require user interaction and can be exploited remotely over the network, increasing its risk profile. The CVSS v3.1 score of 8.8 reflects its high impact on confidentiality, integrity, and availability, with low attack complexity and only requiring low privileges. Although no exploits are currently known in the wild, the vulnerability's characteristics suggest that exploitation could lead to full system compromise, including privilege escalation and persistent control. The affected product is Windows 10 Version 1809, which, despite being an older release, is still present in some enterprise and industrial environments. The lack of available patches at the time of publication necessitates interim mitigations to reduce exposure. This vulnerability highlights the risks associated with legacy systems and the importance of timely patching and network defense strategies.

For European organizations, this vulnerability poses a significant threat, especially those still operating Windows 10 Version 1809 in production environments. Successful exploitation could lead to remote code execution, allowing attackers to gain control over affected systems, steal sensitive data, disrupt operations, or deploy ransomware. Critical infrastructure sectors such as energy, manufacturing, healthcare, and government agencies that rely on legacy Windows systems are particularly vulnerable. The network-based attack vector means that attackers can exploit this flaw remotely without user interaction, increasing the risk of widespread compromise if internal networks are not properly segmented. The high impact on confidentiality, integrity, and availability could result in severe operational disruptions and data breaches, with potential regulatory and financial consequences under GDPR and other European data protection laws. Additionally, the persistence of Windows 10 1809 in some industrial control systems and legacy applications in Europe increases the attack surface. Organizations with insufficient patch management or weak network access controls face elevated risks.

Given the absence of an official patch at the time of disclosure, European organizations should implement the following specific mitigations: 1) Immediately identify and inventory all systems running Windows 10 Version 1809, prioritizing those exposed to untrusted networks. 2) Restrict network access to the MSMQ service using firewall rules, allowing only trusted hosts and minimizing exposure to potentially hostile networks. 3) Employ network segmentation to isolate legacy systems from critical infrastructure and sensitive data environments. 4) Monitor network traffic for unusual MSMQ activity or anomalous message patterns indicative of exploitation attempts. 5) Enforce the principle of least privilege by limiting user and service accounts that can interact with MSMQ. 6) Prepare for rapid deployment of patches once Microsoft releases updates by testing and validating them in controlled environments. 7) Consider upgrading affected systems to supported Windows versions with active security updates to reduce long-term risk. 8) Implement endpoint detection and response (EDR) solutions capable of detecting exploitation behaviors related to type confusion and remote code execution. 9) Conduct user awareness training to recognize and report suspicious network activity, even though user interaction is not required for this exploit. 10) Maintain up-to-date backups and incident response plans to mitigate potential damage from successful attacks.