CVE-2026-73748 in Fabric Composer
Summary
by MITRE • 09/01/2026
A vulnerability in the affected interface of HPE Networking Fabric Composer allows an attacker with administrative privileges to access sensitive information in a cleartext format. A successful exploit allows an attacker to retrieve information which could be used to potentially gain further access to network services supported by HPE Networking Fabric Composer.
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Analysis
by VulDB Data Team • 09/01/2026
The vulnerability identified within the affected interface of Hewlett Packard Enterprise (HPE) Networking Fabric Composer represents a critical failure in data protection mechanisms, specifically concerning the handling and transmission of sensitive credentials or configuration parameters. This flaw allows an attacker who has already obtained administrative privileges on the system to extract information that is stored or transmitted in cleartext format rather than being encrypted using robust cryptographic standards such as AES-256 or TLS 1.3. The presence of plaintext data within a management plane interface significantly undermines the confidentiality guarantees expected in enterprise network infrastructure, creating a direct pathway for credential harvesting and subsequent lateral movement across the managed environment.
From a technical perspective, this issue aligns with CWE-319, which classifies cleartext transmission or storage of sensitive information as a distinct weakness. The root cause likely stems from improper implementation of encryption protocols during API calls or database queries where administrative tools interact with backend services. Instead of ensuring that all data exchanges are encapsulated within secure channels, the application leaves specific fields exposed in their original form. This oversight is particularly dangerous because it bypasses standard security controls designed to protect authentication tokens, private keys, and network configuration details from unauthorized inspection by entities operating at the administrative level.
The operational impact of this vulnerability extends beyond simple data leakage. By retrieving sensitive information such as API keys, database passwords, or internal service credentials in plaintext, an attacker can leverage these assets to authenticate against other services supported by HPE Networking Fabric Composer without needing to crack hashes or break encryption algorithms. This capability facilitates privilege escalation and lateral movement, allowing the adversary to pivot from a compromised management node to critical network devices such as switches, routers, and firewalls. The ability to access these credentials effectively neutralizes perimeter defenses that rely on strong authentication practices, thereby increasing the risk of widespread service disruption, data exfiltration, or complete infrastructure compromise.
In terms of threat modeling, this vulnerability maps directly to ATT&CK technique T1078, Valid Accounts, as it enables an attacker to use legitimate administrative credentials for unauthorized access. Furthermore, if the cleartext information includes network topology details or routing tables, it may also relate to T1016, System Network Configuration Discovery, aiding in reconnaissance efforts that precede more destructive attacks such as ransomware deployment or data theft. The ease of exploitation given existing admin privileges makes this a high-severity issue requiring immediate attention to prevent cascading failures across the network fabric managed by the compromised system.
Mitigation strategies must focus on both technical remediation and procedural improvements. Immediately, administrators should ensure that all patches provided by HPE for Networking Fabric Composer are applied to enforce proper encryption standards in the affected interface. If patching is not immediately feasible, implementing strict access controls via a bastion host or jump server can limit direct exposure of the vulnerable component. Additionally, organizations should audit their logging and monitoring systems to detect any unusual API calls that might indicate exploitation attempts. Long-term remediation requires adopting a zero-trust architecture where no administrative action is trusted by default, ensuring that even privileged accounts are subject to multi-factor authentication and continuous verification before accessing sensitive management interfaces. Regular security assessments and code reviews should be conducted to identify similar weaknesses in other components of the network management stack.