CVE-2026-73779 in AOS-CX
Summary
by MITRE • 09/01/2026
Vulnerabilities have been identified in the operating system of AOS-CX switches that could potentially allow an unauthenticated remote actor to circumvent existing authentication controls. Successful exploitation could compromise system integrity and further expose sensitive information.
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Analysis
by VulDB Data Team • 09/01/2026
The identified vulnerability within the operating system of Aruba AOS-CX network switches represents a critical security flaw that undermines the fundamental principle of access control in enterprise networking infrastructure. This specific weakness allows an unauthenticated remote actor to bypass existing authentication mechanisms, effectively granting unauthorized individuals or automated threat actors direct access to the switch's management interface without valid credentials. In modern data center and campus networks, these switches serve as critical nodes for traffic forwarding, policy enforcement, and network segmentation; therefore, compromising their integrity poses a severe risk to the overall security posture of the organization. The ability to circumvent authentication controls means that an attacker can interact with the device's command line interface or management plane from any reachable IP address on the network segment, provided they have basic connectivity, which significantly lowers the barrier for entry compared to vulnerabilities requiring prior access or complex exploitation chains.
From a technical perspective, this flaw likely stems from improper validation of authentication requests within the switch’s web server or API handling components, allowing specific malformed or crafted packets to trigger administrative functions without passing through standard credential verification processes. This type of vulnerability is commonly categorized under CWE-287, which describes Improper Authentication, and often relates to CWE-306, Missing Authentication for Critical Function, where the system fails to verify identity before performing sensitive operations. The operational impact of such a compromise is profound; once an attacker gains unauthenticated access, they can execute arbitrary commands, modify network configurations, alter routing tables, or disable security features like ACLs and port security. This level of control enables lateral movement within the internal network, allowing the attacker to pivot from the compromised switch to other connected devices, including servers, endpoints, and other network appliances. Furthermore, the exposure of sensitive information may include configuration files containing plaintext passwords, SSH keys, or SNMP community strings, which can be harvested for further attacks against higher-value targets in the environment.
The implications extend beyond immediate system compromise to long-term operational integrity and compliance failures. Network switches are often integral to Zero Trust architectures, where strict identity verification is required before any resource access is granted. A vulnerability that allows unauthenticated bypass effectively creates a backdoor into this architecture, rendering other security controls such as firewalls or intrusion detection systems less effective if the attacker can manipulate network paths or disable logging mechanisms directly on the switch itself. Additionally, many regulatory frameworks including PCI DSS and HIPAA require strict access controls over critical infrastructure; exploiting this vulnerability would constitute a direct violation of these compliance mandates due to the lack of audit trails for unauthenticated administrative actions and the potential exposure of protected data traversing the compromised network segments.
To mitigate this risk, immediate action is required to apply vendor-provided software patches that address the authentication bypass flaw in AOS-CX versions affected by this vulnerability. Organizations should verify their current firmware version against Aruba’s official security advisories and schedule a maintenance window for deployment if necessary. In addition to patching, network segmentation strategies should be reviewed to ensure that management interfaces are not exposed to untrusted networks or the public internet. Implementing strict access control lists on upstream routers to restrict SSH and HTTPS traffic to only authorized management stations can provide an additional layer of defense in depth. Furthermore, enabling comprehensive logging and monitoring for any administrative login attempts, including failed ones, will aid in detecting exploitation attempts even if authentication controls are bypassed initially. Regular vulnerability scanning focused specifically on network device firmware versions is also recommended to ensure that similar flaws do not go unnoticed in the future.