CVE-2026-58279 in CycleCloud
Summary
by MITRE • 07/14/2026
Missing authorization in Azure CycleCloud allows an authorized attacker to elevate privileges over a network.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical authorization flaw within Microsoft Azure CycleCloud platform that enables authenticated attackers to escalate their privileges and gain unauthorized access to network resources. The issue stems from insufficient access controls that fail to properly validate user permissions during privilege escalation operations, creating a pathway for malicious actors who have already established initial access to expand their operational capabilities within the cloud environment.
The technical implementation of this vulnerability typically manifests through improper validation of user roles and permissions within CycleCloud's administrative interfaces and API endpoints. Attackers can exploit this weakness by leveraging their existing authorized session to perform actions that should require higher privilege levels, effectively bypassing the intended security boundaries that separate standard users from administrators or system operators. This misconfiguration allows unauthorized privilege elevation without proper authentication checks or role validation mechanisms.
From an operational impact perspective, this vulnerability creates significant risk for organizations using Azure CycleCloud for cluster management and HPC workloads. An attacker who successfully exploits this weakness can gain access to sensitive configuration data, modify cluster settings, access compute resources, and potentially compromise the entire cloud infrastructure managed through CycleCloud. The elevated privileges enable further lateral movement within the network, data exfiltration, and potential persistence mechanisms that could remain undetected for extended periods.
The vulnerability aligns with CWE-284 which specifically addresses improper access control and insufficient authorization checks in software systems. This weakness falls under the broader category of privilege escalation vulnerabilities that are frequently targeted by adversaries seeking to maximize their operational impact within compromised environments. The attack pattern closely resembles techniques documented in the MITRE ATT&CK framework under the Privilege Escalation tactic, particularly focusing on the use of legitimate credentials to perform unauthorized actions.
Organizations should implement immediate mitigations including enhanced role-based access controls, regular security audits of administrative interfaces, and implementation of principle of least privilege configurations. Network segmentation and monitoring of administrative API calls can help detect suspicious activities related to privilege escalation attempts. Additionally, organizations should consider implementing multi-factor authentication for administrative accounts and regular vulnerability assessments to identify similar authorization gaps within their cloud infrastructure. The remediation efforts should focus on strengthening the authorization framework within CycleCloud to ensure that all privilege elevation requests undergo proper validation against defined security policies and user entitlements.