CVE-2026-73760 in AOS-CX
Summary
by MITRE • 09/02/2026
An authenticated Path Traversal vulnerability exists in AOS-CX. Successful exploitation of this vulnerability allows an attacker to read arbitrary files from the web-based management interface of the underlying operating system, which could lead to remote unauthorized access to files.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 09/02/2026
The identified vulnerability represents a critical security flaw within the Aruba OS-CX (AOS-CX) network operating system, specifically affecting its web-based management interface. This issue is classified as an authenticated path traversal attack, meaning that while it requires valid credentials for initial access, the subsequent exploitation allows for significant lateral movement and data exfiltration beyond the intended scope of the user account. The core technical flaw lies in the improper validation or sanitization of file paths provided by the client during requests to the management interface. When a user submits a request containing directory traversal sequences, such as dot-dot-slash (../) characters, the application fails to adequately restrict access to only those files within its designated web root or sandboxed environment. Instead, it processes these relative path components and resolves them against the underlying operating system's file structure. This lack of strict input validation enables an attacker to manipulate the intended resource location, effectively bypassing directory restrictions that are supposed to isolate application data from sensitive system configurations.
From a technical perspective, this vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-22: Improper Limitation of a Pathname to a Restricted Directory. The mechanism allows an authenticated actor to read arbitrary files from the underlying operating system hosting AOS-CX. In many network device architectures, the web management interface runs as a service that has specific permissions relative to the OS file system. If this service does not strictly enforce chroot jails or equivalent sandboxing mechanisms for all input vectors, attackers can traverse up the directory hierarchy using standard path manipulation techniques. By carefully constructing URLs with repeated traversal sequences followed by absolute paths to sensitive files, an attacker can access configuration backups, SSH host keys, user credential hashes, and other critical system artifacts that are not intended to be exposed through the web interface.
The operational impact of this vulnerability is severe due to the potential for remote unauthorized access to highly sensitive information. Once an attacker successfully exploits the path traversal flaw, they gain read-only access to files across the operating system partition where AOS-CX resides. This can lead directly to credential theft if password hashes or plaintext credentials are stored in accessible configuration files. Furthermore, exposure of SSH host keys could allow for man-in-the-middle attacks against future management sessions. The ability to read arbitrary files also facilitates reconnaissance, allowing attackers to map the internal network topology, identify other vulnerable services running on adjacent devices via shared configurations, and plan further exploitation steps. Although the initial requirement is authentication, which limits the attack surface compared to unauthenticated vulnerabilities, it remains a high-risk issue because many enterprise environments rely on single sign-on or have compromised administrative credentials through phishing or brute-force attacks.
This vulnerability maps directly to several tactics in the MITRE ATT&CK framework for both Enterprise and ICS domains. It falls under the Initial Access tactic via Valid Accounts, as exploitation requires prior authentication. The subsequent action of reading files corresponds to the Data Staging technique within the Collection phase, where attackers gather data from local systems before exfiltration. Additionally, accessing sensitive system files can be categorized under Credential Access if password hashes or private keys are retrieved. Understanding these mappings is crucial for security teams monitoring network traffic and user behavior analytics (UBA) solutions that track anomalous file access patterns originating from management interfaces.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. The primary defense is the deployment of vendor-provided software updates or patches that address this specific path traversal flaw by implementing strict input validation and canonicalization checks for all file paths processed by the web interface. Administrators should ensure that their AOS-CX instances are updated to versions where this vulnerability has been resolved. In addition to patching, network segmentation plays a vital role in limiting exposure; management interfaces should be accessible only from trusted administrative subnets or through secure virtual private networks (VPNs) with multi-factor authentication enabled. This reduces the likelihood of an attacker obtaining valid credentials in the first place. Furthermore, implementing strict file system permissions and ensuring that web services run under least-privilege accounts can limit the damage even if a traversal attempt succeeds by restricting which parts of the OS are readable by the application process. Regular audits of configuration files for sensitive data exposure and monitoring logs for unusual path manipulation attempts in HTTP requests will also aid in early detection and response to potential exploitation activities.