CVE-2026-73755 in AOS-CX
Summary
by MITRE • 09/02/2026
A privilege escalation vulnerability exists in the API endpoint of AOS-CX. Successful exploitation could allow an authenticated low-privilege operator user, after a required user action, to access sensitive information from the vulnerable system.
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Analysis
by VulDB Data Team • 09/02/2026
The identified security flaw resides within the application programming interface endpoints of Aruba Networking's AOS-CX operating system, representing a critical failure in role-based access control mechanisms. This vulnerability specifically impacts authenticated users who possess only operator-level privileges, which are typically intended to provide limited monitoring and diagnostic capabilities without granting administrative authority or deep system configuration rights. The core technical deficiency lies in the improper enforcement of authorization checks during API request processing, allowing an attacker with valid but low-privilege credentials to bypass expected restrictions through specific manipulation of input parameters or endpoint invocation sequences. This type of flaw is characteristic of broken access control issues where the server fails to verify that a user has sufficient permissions for the action they are attempting to perform on a given resource.
From a technical perspective, this vulnerability enables an authenticated low-privilege operator user to escalate their effective privileges by accessing sensitive information that should be restricted to higher-level administrators or system owners. The exploitation requires a required user action, indicating that the attack is not entirely automated but necessitates some form of interaction from the attacker, such as clicking a malicious link or submitting specific API calls through an authorized session. Once exploited, this flaw allows the adversary to retrieve confidential data stored within the network infrastructure managed by AOS-CX devices. This could include sensitive configuration details, internal network topology maps, credentials for other services, or proprietary operational metrics that are not intended for general operator access. The ability to extract such information significantly compromises the confidentiality and integrity of the entire network environment protected by these switches.
The operational impact of this vulnerability is substantial as it undermines the principle of least privilege within enterprise networks. By allowing an operator user to view sensitive data, attackers can gather intelligence necessary for further exploitation stages, including lateral movement or more severe system compromise. This exposure facilitates reconnaissance activities where adversaries map out network structures and identify high-value targets based on the retrieved information. Furthermore, if the exposed data includes authentication tokens or configuration snippets containing secrets, it could lead to full account takeover or unauthorized changes to critical network settings. The risk is exacerbated in environments where operator accounts are frequently used for routine maintenance tasks, increasing the attack surface available to malicious insiders or external attackers who have managed to obtain low-level credentials through phishing or other initial access vectors.
This vulnerability aligns with Common Weakness Enumeration category CWE-269, which addresses Improper Privilege Assignment, and specifically relates to scenarios where authorization checks are bypassed via API endpoints. In the context of the MITRE ATT&CK framework, this behavior corresponds to techniques involving Valid Accounts for initial access or persistence, followed by Credential Access or Discovery tactics as the attacker leverages the escalated privileges to gather sensitive data. The exploitation path suggests a need for careful review of how role-based permissions are mapped to API endpoints and whether input validation is sufficient to prevent unauthorized data retrieval despite valid authentication tokens being present.
To mitigate this risk, immediate action should be taken by applying vendor-provided patches or software updates that address the authorization logic flaws in the AOS-CX API implementation. Administrators must ensure that all network devices running affected versions are updated to secure releases as soon as they become available from Aruba Networking. In addition to patching, organizations should implement strict monitoring and logging of API access patterns to detect anomalous behavior indicative of exploitation attempts. Network segmentation strategies should be reviewed to limit the blast radius if an operator account is compromised, ensuring that sensitive management interfaces are not directly accessible from untrusted network zones. Regular audits of user roles and permissions can also help identify accounts with excessive privileges that could be leveraged in such attacks, reinforcing a defense-in-depth approach to API security within the enterprise infrastructure.