CVE-2026-76657: Vulnerability in Hewlett Packard Enterprise (HPE) Fabric Composer

CVE-2026-76657 is a critical authentication bypass vulnerability in the API of HPE Networking Fabric Composer version 7.0.0. The flaw enables unauthenticated remote attackers to circumvent authentication mechanisms and gain administrative access, potentially leading to complete system compromise. The vulnerability is classified under CWE-287 (Improper Authentication) and has a CVSS 3.1 base score of 10.0, indicating maximum severity with network attack vector, no required privileges or user interaction, and full confidentiality, integrity, and availability impact. No official patch or remediation guidance has been published by the vendor as of the data provided.

Successful exploitation allows an unauthenticated remote attacker to bypass authentication controls and gain administrative privileges on the HPE Fabric Composer host. This can lead to complete compromise of the system, including unauthorized access, control, and potential disruption of network fabric management.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to the Fabric Composer API to trusted management networks only and monitor for any suspicious activity related to authentication bypass attempts.