CVE-2026-35425 in Azure API Management
Summary
by MITRE • 07/24/2026
Improper access control in Azure API Management (APIM) allows an authorized attacker to execute code over a network.
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Analysis
by VulDB Data Team • 07/24/2026
This vulnerability represents a critical improper access control flaw within Microsoft Azure API Management service that enables authenticated attackers to escalate their privileges and execute arbitrary code remotely. The weakness stems from insufficient authorization checks within the APIM infrastructure, allowing malicious actors who have gained initial access through legitimate means to bypass security controls and gain elevated system privileges. Such vulnerabilities fall under the CWE-285 category of Improper Authorization, which directly impacts the fundamental security principle of least privilege and can lead to complete system compromise.
The technical implementation of this flaw typically involves weaknesses in the API Management service's authentication and authorization mechanisms where legitimate users can manipulate request parameters or exploit misconfigurations in access control policies. Attackers may leverage this vulnerability through various attack vectors including API endpoint manipulation, header injection, or by exploiting weak session management within the APIM environment. The ATT&CK framework categorizes this under privilege escalation techniques where adversaries leverage weaknesses in access control to gain elevated permissions and execute malicious payloads.
Operational impact of this vulnerability extends beyond simple unauthorized access as it creates a persistent backdoor for attackers to maintain long-term presence within the Azure environment while executing arbitrary commands on affected systems. The compromised APIM instances can serve as launchpads for further lateral movement attacks, potentially allowing attackers to access other interconnected services and resources within the cloud infrastructure. Organizations may experience data exfiltration, service disruption, and compliance violations due to unauthorized system modifications and potential insider threat exploitation.
Mitigation strategies should focus on implementing robust access control policies including regular security assessments of APIM configurations, enforcing principle of least privilege for all API endpoints, and deploying network segmentation controls to limit lateral movement. Organizations must conduct comprehensive vulnerability scanning of their Azure environments using tools like Azure Security Center and implement automated monitoring solutions to detect anomalous access patterns. Regular patch management and adherence to Microsoft's security best practices including proper role-based access control implementation and secure API design principles are essential defensive measures against such exploitation attempts.