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HPE Fabric Composer CVE-2026-95738

| EUVDEUVD-2026-116282 HIGH
2026-11-03 security-alert@hpe.com GHSA-674v-9495-q76v
8.1
CVSS 3.1 · Vendor: hpe
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach Fabric Composer management interface
  2. Exploit
    Preconditions happen to be met
  3. Execution
    Bypass authentication controls
  4. Impact
    Gain administrative access to system

Vulnerability Assessment

Exploitation Conditions

Exploitation requires network reachability to the affected HPE Networking Fabric Composer interface by an unauthenticated attacker (PR:N). The critical limiting factor, stated by the vendor, is that 'certain preconditions outside of the attacker's control' must be met - the vendor does not enumerate these preconditions, so the specific product state, configuration or deployment mode that enables the bypass is not described in the available sources. This dependency (reflected as AC:H) means exploitation is not reliable or on-demand: defenders should note that an attacker cannot simply trigger it against any reachable instance. Success grants administrative access to the affected system.

Impact

This is a credible but conditional priority. The supplied CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, base 8.1) indicates a network-reachable, unauthenticated vulnerability that yields full confidentiality, integrity and availability impact - consistent with the description's claim of administrative access. The decisive mitigating signal is AC:H, which the description grounds explicitly: exploitation requires 'certain preconditions outside of the attacker's control.' This means the flaw is not reliably exploitable on demand, which lowers its real-world weaponizability relative to a clean AV:N/AC:L auth bypass. No EPSS score, no CISA KEV listing and no SSVC automatable/technical-impact breakdown were provided, so exploitation probability cannot be quantified. There is no public exploit identified at time of analysis. The vendor-assigned priority is 'this_week' (vuln.today Decision label), which aligns with a high-severity but condition-gated issue rather than an emergency. Net: treat as a genuine high-severity authentication bypass worth prompt patching, but the AC:H precondition and the absence of any exploitation evidence argue against emergency-grade urgency. Note a nuance: PR:N and the 'authentication bypass' nature are consistent, but the exact nature of the required preconditions is not described, so the practical attack surface cannot be confirmed from available data.

Exploit ScenarioDerived

A remote attacker with network access to the HPE Networking Fabric Composer management interface attempts to bypass authentication to reach administrative functions. Because success depends on preconditions outside the attacker's control (AC:H), exploitation is opportunistic - it only succeeds when the target system happens to be in the required state. If it succeeds, the attacker gains administrative access to the fabric management system. No public exploit code has been identified.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet

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AnalysisAIv1 – Nov 03, 2026

Authentication bypass in HPE Networking Fabric Composer allows an unauthenticated remote attacker to gain administrative access if vendor-stated preconditions outside the attacker's control are met. HPE has not enumerated those preconditions, so the specific configuration or deployment state required is not described in the available sources. No confirmed active exploitation (CISA KEV) and no public exploit identified at time of analysis.

RemediationAI

No vendor-released patch or fixed version is identified in the provided data; consult the HPE advisory (https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05172en_us&docLocale=en_US) for the fixed release and apply it when available. Until a fix is applied, restrict network reachability to the affected Fabric Composer interface to trusted administrative networks, since exploitation requires network access and the vendor has not enumerated the preconditions that enable the bypass; this reduces exposure but does not remediate the authentication bypass. Monitor the HPE advisory for version-specific remediation guidance.

Affected VersionsENISA

Fabric Composer 7.4.0 ≤7.4.0
Fabric Composer 7.0.0 ≤7.3.4

Affected Packages

euvd fabric_composer no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

HPE Networking Fabric Composer is a network fabric management and orchestration product; this issue is an authentication bypass in an affected interface. The CVSS vector is AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, meaning a network-reachable, unauthenticated attacker can achieve high confidentiality, integrity, and availability impact, but AC:H reflects the vendor's statement that exploitation depends on preconditions outside the attacker's control. The vendor does not enumerate those preconditions, and the available sources do not describe the trigger mechanism, affected interface name, or affected versions; no CWE is assigned in the input.

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Severity by source

Vendor (hpe) PRIMARY 8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.1 HIGH

Remote unauthenticated auth bypass (AV:N/PR:N) gated by attacker-uncontrolled preconditions (AC:H), yielding full admin access hence C:H/I:H/A:H with unchanged scope.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (hpe).

CVSS VectorVendor: hpe

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Authentication bypass vulnerabilities in the affected interface of HPE Networking Fabric Composer could allow an unauthenticated remote attacker to circumvent existing authentication controls if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to gain administrative access to the affected system.

Executive ViewAI

Why It Matters

HPE Networking Fabric Composer contains an authentication bypass vulnerability (CVE-2026-95738, CVSS 8.1) that could let an unauthenticated remote attacker obtain administrative control, though HPE states that exploitation depends on unspecified preconditions outside the attacker's control. Because Fabric Composer is a fabric management and orchestration platform for HPE networking environments, a successful compromise would give an adversary broad administrative reach over the managed network estate. Leadership should care because network-wide administrative compromise carries elevated risk of configuration manipulation and lateral movement, even though no active exploitation or public exploit has been identified.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: restrict management-plane access to trusted networks via firewall rules, VPN, or jump hosts; place Fabric Composer behind an authenticated reverse proxy; enforce network segmentation and monitor authentication logs for anomalies; remove direct internet exposure of the management interface where feasible.

Threat Intelligence Overview

Prevalence
Medium
specific HPE/Aruba data-center fabric management appliance, not broadly ubiquitous
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS N/A
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

40
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +40
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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