Description

An arbitrary file write vulnerability in the API of HPE Networking Fabric Composer could allow an authenticated low privilege operator user to escalate privileges. Successful exploitation of this vulnerability may enable the attacker to execute arbitrary commands on the underlying operating system, leading to complete compromise of the affected system.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-09-01T20:17:17.870Z",
  "pubdate": "2026-09-01T20:17:17.870Z",
  "executiveSummary": "HPE Networking Fabric Composer is susceptible to an arbitrary file write vulnerability within its API component.\nThis vulnerability allows an authenticated user with low-privilege operator status to perform unauthorized write operations to the underlying file system.\nBy manipulating API requests, an attacker can overwrite critical system configuration files or binary paths.\nSuccessful exploitation facilitates vertical privilege escalation, granting the attacker the ability to execute arbitrary commands with elevated system privileges.\nThis leads to a complete compromise of the appliance, potentially enabling full control over the networking fabric management environment.\nThe vulnerability is restricted to authenticated users, necessitating valid, albeit low-privileged, session credentials to initiate the attack sequence.",
  "technicalDetails": "The vulnerability originates from insecure input validation within the API surface of HPE Networking Fabric Composer, which fails to restrict file system access during write operations.\nThe root cause is an Improper Neutralization of Special Elements used in a Pathname (CWE-22 or similar arbitrary file write primitive), where the API accepts user-supplied paths without sufficient sanitization or access control list enforcement against sensitive system directories.\nThe attack flow begins with an authenticated operator user crafting a malicious API request. By manipulating parameters that influence file path construction, the user can escape the intended application-specific directory constraints to target restricted locations on the underlying Linux-based operating system.\nUpon receiving the malicious request, the affected API component processes the input without adequate checks, allowing the application to write data to arbitrary locations.\nAn attacker can leverage this capability to overwrite existing shell scripts, configuration files, or binaries that are executed by the root user or system services upon restart or during periodic tasks.\nA common exploitation vector involves overwriting a configuration file that dictates command execution parameters or replacing an existing executable with a malicious binary payload.\nOnce the target file is successfully overwritten with attacker-controlled data, the attacker triggers the execution of the modified file, either through existing system triggers or by waiting for automated background processes to execute the tainted code.\nThe post-exploitation phase allows the attacker to transition from a restricted operator account to a high-privileged or root-level security context. With command execution capabilities, the attacker can persist in the environment, exfiltrate sensitive network topology data, manipulate fabric configurations, or utilize the appliance as a pivot point for lateral movement within the management network.\nThe vulnerability does not require physical access and is reachable over the network management interface as long as the attacker possesses valid low-privilege operator credentials."
}