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Full vulnerability report · 2026
CVE-2026-73709High confidence

Unauthenticated Remote Code Execution during HPE Networking Fabric Composer Installation Process

Hewlett Packard Enterprise (HPE) · Fabric Composer

8.3HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-69436

No EUVD known-exploited evidence

A vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an unauthenticated adjacent attacker to run arbitrary commands on the underlying host if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary commands on the underlying operating system.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
8.3 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

A vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an unauthenticated adjacent attacker to run arbitrary commands on the underlying host if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary commands on the underlying operating system.

What

A vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an unauthenticated adjacent attacker to run arbitrary commands on the underlying host if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary commands on the underlying operating system.

Why

Untrusted input reaches a command interpreter without sufficient validation or separation from command syntax.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

A vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an unauthenticated adjacent attacker to run arbitrary commands on the underlying host if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary commands on the underlying operating system.

Why

Untrusted input reaches a command interpreter without sufficient validation or separation from command syntax.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
an adjacent network → Improper Neutralization of Special Elements used in a Command ('Command Injection') → execute code or commands in the affected security context
Attack surface
Adjacent
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-77 ↗

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection'). The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
UnauthenticatedRemote code executionCWE-77
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-69436Official EUVD mapping

A vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an unauthenticated adjacent attacker to run arbitrary commands on the underlying host if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary commands on the underlying operating system.

Official EUVD record
CERT-FR · French · CERTFR-2026-AVI-1104Multiples vulnérabilités dans les produits HPE Aruba Networking

d?id=CVE-2026-73700 Référence CVE CVE-2026-73701 https://www.cve.org/CVERecord?id=CVE-2026-73701 Référence CVE CVE-2026-73702 https://www.cve.org/CVERecord?id=CVE-2026-73702 Référence CVE CVE-2026-73703 https://www.cve.org/CVERecord?id=CVE-2026-73703 Référence CVE CVE-2026-73704 https://www.cve.org/CVERecord?id=CVE-2026-73704 Référence CVE CVE-2026-73705 https://www.cve.org/CVERecord?id=CVE-2026-73705 Référence CVE CVE-2026-73706 https://www.cve.org/CVERecord?id=CVE-2026-73706 Référence CVE CVE-2026-73707 https://www.cve.org/CVERecord?id=CVE-2026-73707 Référence CVE CVE-2026-73708 https://www.cve.org/CVERecord?id=CVE-2026-73708 Référence CVE CVE-2026-73709 https://www.cve.org/CVERecord?id=CVE-2026-73709 Référence CVE CVE-2026-73710 https://www.cve.org/CVERecord?id=CVE-2026-73710 Référence CVE CVE-2026-73711 https://www.cve.org/CVERecord?id=CVE-2026-73711 Référence CVE CVE-2026-73712 https://www.cve.org/CVERecord?id=CVE-2026-73712 Référence CVE CVE-2026-73713 https://www.cve.org/CVERecord?id=CVE-2026-73713 Référence CVE CVE-2026-73714 https://www.cve.org/CVERecord?id=CVE-2026-73714 Référence CVE CVE-2026-73715 https://www.cve.org/CVERecord?id=CVE-2026-73715 Référence CVE CVE-2026-73716 https://www.cve.org/CVERecord?id=CVE-2026-73716 Référence CVE CVE-2026-73717 https://www.cve.org/CVERecord?id=

Official advisory
CSIRT Italia · Italian · risolte-vulnerabilita-in-prodotti-hpe-aruba-networking-1Risolte vulnerabilità in prodotti HPE Aruba Networking

nuova finestra - - CVE-2026-73723 : apre una nuova finestra - - CVE-2026-73722 : apre una nuova finestra - - CVE-2026-73721 : apre una nuova finestra - - CVE-2026-73720 : apre una nuova finestra - - CVE-2026-73719 : apre una nuova finestra - - CVE-2026-73718 : apre una nuova finestra - - CVE-2026-73717 : apre una nuova finestra - - CVE-2026-73716 : apre una nuova finestra - - CVE-2026-73715 : apre una nuova finestra - - CVE-2026-73714 : apre una nuova finestra - - CVE-2026-73713 : apre una nuova finestra - - CVE-2026-73712 : apre una nuova finestra - - CVE-2026-73711 : apre una nuova finestra - - CVE-2026-73710 : apre una nuova finestra - - CVE-2026-73709 : apre una nuova finestra - - CVE-2026-73708 : apre una nuova finestra - - CVE-2026-73707 : apre una nuova finestra - - CVE-2026-73706 : apre una nuova finestra - - CVE-2026-73705 : apre una nuova finestra - - CVE-2026-73704 : apre una nuova finestra - - CVE-2026-73703 : apre una nuova finestra - - CVE-2026-73702 : apre una nuova finestra - - CVE-2026-73701 : apre una nuova finestra - - CVE-2026-73700 : apre una nuova finestra - - CVE-2026-19766 : apre una nuova finestra - - Riferimenti (2) https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05133en_us&docLocale=en_US https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw0513

Official advisory
NCSC-NL · Dutch · NCSC-2026-0339Kwetsbaarheden verholpen in HPE Networking Fabric Composer

A vulnerability in HPE Networking Fabric Composer's operating system allows an unauthenticated adjacent attacker to execute arbitrary commands on the host under specific external conditions.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
7.0.0 ≤ 7.3.3
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 1 Sept 2026 · Last source change 2 Sept 2026, 14:38 UTC · CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-02
European sourceENISA EUVD · EUVD-2026-69436
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →
  1. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to vendor advisory.
    Before
    no authoritative guidance recorded
    After
    vendor advisory
    security-alert@hpe.com ↗
  2. ENISA EUVD mappingEUVD-2026-69436 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-69436"}
    ENISA EUVD ↗
  3. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-69436↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-73709 · cve.blacktree.nl