CVE-2025-53772 is a vulnerability classified under CWE-502 (Deserialization of Untrusted Data) affecting Microsoft Web Deploy 4.0, specifically version 10.0.2000. Web Deploy is a Microsoft tool used for simplifying the deployment of web applications and services. The vulnerability arises because the software improperly handles deserialization of data received over the network, allowing an attacker with authorized access to send crafted serialized objects that the system deserializes without sufficient validation. This can lead to remote code execution (RCE), enabling the attacker to run arbitrary code with the privileges of the Web Deploy service. The CVSS v3.1 score of 8.8 reflects a high severity, with attack vector being network-based, low attack complexity, requiring privileges but no user interaction, and impacting confidentiality, integrity, and availability. Although no public exploits have been reported yet, the vulnerability's characteristics make it a significant risk, especially in environments where Web Deploy is exposed or accessible within internal networks. The lack of available patches at the time of reporting means organizations must rely on interim mitigations until official updates are released.

For European organizations, exploitation of this vulnerability could lead to severe consequences including unauthorized system control, data breaches, and service disruptions. Given Web Deploy's role in deploying web applications, successful exploitation could compromise web servers and backend systems, potentially affecting critical business operations and sensitive data. The high CVSS score indicates a strong likelihood of significant impact on confidentiality, integrity, and availability. Organizations in sectors such as finance, healthcare, government, and critical infrastructure, which often use Microsoft deployment tools, could face operational downtime, regulatory penalties under GDPR for data breaches, and reputational damage. The network-based nature of the attack means that even internal threats or compromised credentials could be leveraged to exploit this flaw, increasing the risk profile for enterprises with complex network architectures.

Immediate mitigation steps include restricting network access to the Web Deploy service to trusted administrators and systems only, using network segmentation and firewall rules to limit exposure. Organizations should implement strict access controls and monitor logs for unusual deserialization activity or unexpected Web Deploy usage patterns. Employing application whitelisting and endpoint detection and response (EDR) solutions can help detect and block exploitation attempts. Until a vendor patch is released, disabling or uninstalling Web Deploy where it is not essential can reduce risk. Once Microsoft releases an official patch, organizations must prioritize its deployment. Additionally, conducting a thorough audit of systems using Web Deploy and reviewing privilege assignments can minimize the attack surface. Regular backups and incident response plans should be updated to prepare for potential exploitation scenarios.