CVE-2025-53728 in Dynamics 365
Summary
by MITRE • 08/12/2025
Exposure of sensitive information to an unauthorized actor in Microsoft Dynamics 365 (on-premises) allows an unauthorized attacker to disclose information over a network.
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Analysis
by VulDB Data Team • 09/10/2025
Microsoft Dynamics 365 on-premises installations contain a critical information exposure vulnerability that enables unauthorized actors to access sensitive data through network communications. This vulnerability falls under the common weakness enumeration category of CWE-200, which specifically addresses the exposure of sensitive information to unauthorized actors. The flaw manifests when the system fails to properly validate or restrict access to internal data structures, allowing attackers to intercept and disclose confidential information through network-based attacks. The vulnerability represents a significant security gap in the authorization mechanisms that should protect sensitive business data within enterprise environments.
The technical implementation of this vulnerability stems from inadequate input validation and insufficient access control enforcement within the Dynamics 365 on-premises framework. Attackers can exploit this weakness by crafting specific network requests that bypass normal authentication and authorization checks, potentially gaining access to customer records, financial data, employee information, and other proprietary business assets. The vulnerability's network-based nature means that attackers do not require physical access to the system or elevated privileges within the organization's network infrastructure to exploit the flaw. This characteristic aligns with the attack pattern described in the MITRE ATT&CK framework under the T1071.004 technique for application layer protocol: DNS, where adversaries leverage network protocols to extract sensitive information.
The operational impact of this vulnerability extends beyond simple data disclosure, as it can lead to severe business disruption and regulatory compliance violations. Organizations utilizing Microsoft Dynamics 365 on-premises solutions face potential exposure of personally identifiable information, intellectual property, and financial records that could result in substantial financial losses, legal penalties, and reputational damage. The vulnerability affects the core integrity of the system's data protection mechanisms and undermines the trust that businesses place in their enterprise resource planning systems. Security professionals should note that this vulnerability can be particularly dangerous in environments where the on-premises Dynamics 365 systems are connected to external networks or accessed through remote connections, as these attack vectors provide additional entry points for threat actors.
Organizations should implement immediate mitigations including network segmentation to isolate Dynamics 365 systems from unauthorized network access, enhanced firewall rules to restrict communication ports, and comprehensive monitoring of network traffic for suspicious patterns. The implementation of secure network protocols and proper access control measures should be prioritized to prevent unauthorized data access. Security teams must also conduct thorough vulnerability assessments to identify similar exposure points within their broader IT infrastructure. Regular security updates and patches should be applied promptly to address the root cause of the vulnerability. Additionally, organizations should consider implementing data loss prevention tools and continuous monitoring solutions that can detect and alert on potential information disclosure attempts. The remediation process should align with industry best practices for secure system administration and follow the principle of least privilege to minimize the potential impact of similar vulnerabilities in the future.