CVE-2025-29819 is a medium-severity vulnerability classified under CWE-73 (External Control of File Name or Path) affecting Microsoft Windows Admin Center integrated within the Azure Portal, specifically version 1.0. This vulnerability allows an unauthorized attacker to influence the file name or path parameters used by the Windows Admin Center component, potentially leading to local information disclosure. The flaw arises because the application does not properly validate or sanitize external input controlling file paths, enabling attackers to access sensitive files or directories on the local system that should otherwise be restricted. The vulnerability has a CVSS 3.1 base score of 6.2, reflecting a medium impact with a vector of AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, meaning the attack requires local access but no privileges or user interaction, and can result in high confidentiality impact without affecting integrity or availability. Although no known exploits are currently reported in the wild, the vulnerability poses a risk to environments where Windows Admin Center is deployed within Azure Portal, especially in scenarios where local access can be gained by an attacker, such as through compromised credentials or insider threats. The vulnerability does not require authentication or user interaction, increasing its risk in multi-tenant or shared environments. The absence of a patch link suggests that remediation may still be pending or that users need to monitor for updates from Microsoft. Given the integration with Azure Portal, this vulnerability could affect cloud management operations and potentially expose sensitive configuration or operational data stored locally on the managed systems.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive local information within their cloud management infrastructure, particularly those leveraging Microsoft Azure and Windows Admin Center for on-premises and hybrid cloud management. The confidentiality breach could expose configuration files, credentials, or operational data, which attackers might use to further compromise systems or escalate privileges. This risk is heightened in regulated industries such as finance, healthcare, and critical infrastructure, where data protection and compliance with GDPR and other regulations are paramount. Additionally, organizations with multi-tenant environments or shared administrative access could face insider threats exploiting this vulnerability to access data beyond their authorization scope. The local attack vector limits remote exploitation but does not eliminate risk, especially in environments with weak endpoint security or where attackers have already gained footholds. The lack of integrity and availability impact reduces the risk of system disruption but does not diminish the potential damage from data leakage. Overall, this vulnerability could undermine trust in cloud management tools and complicate compliance efforts for European entities relying on Azure services.

To mitigate CVE-2025-29819, European organizations should implement the following specific measures: 1) Restrict local access to systems running Windows Admin Center within Azure Portal by enforcing strict endpoint security controls, including multi-factor authentication and least privilege principles for administrative accounts. 2) Monitor and audit local file access logs and Windows Admin Center activity to detect unusual or unauthorized file path manipulations. 3) Isolate Windows Admin Center deployments in secure network segments and limit exposure to only trusted administrators to reduce the attack surface. 4) Apply any forthcoming patches or updates from Microsoft promptly once available, and subscribe to official Microsoft security advisories for real-time notifications. 5) Employ application whitelisting and endpoint detection and response (EDR) solutions to detect and block attempts to exploit file path manipulation. 6) Conduct regular security assessments and penetration testing focused on local privilege escalation and file access controls in Azure Portal environments. 7) Educate administrators on secure usage practices of Windows Admin Center and the risks associated with local file path vulnerabilities. These targeted actions go beyond generic advice by focusing on local access control, monitoring, and proactive patch management tailored to the specific nature of this vulnerability.