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CVE-2026-73709· NVD / CVE Program· CNA hpe

Unauthenticated Remote Code Execution during HPE Networking Fabric Composer Installation Process

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.

HighCVSS 8.3 · v3.1—No exploit No fix recorded
Published
Sep 1, 2026
Updated
Sep 2, 2026
EPSS
0.3% · 24th percentile
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Report tools

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Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · hpe
8.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
arubanetworksfabric composer

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • arubanetworks fabric composerbefore 7.3.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hpe). Independent of NVD's CPE analysis and usually ahead of it.

  • Hewlett Packard Enterprise (HPE) Fabric Composer

    • 7.0.0 and later · up to and including 7.3.3affected · semver

Same product

arubanetworks: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-76658Unauthenticated Remote Code Execution in HPE Networking Fabric Composer SSH Daemon
    40Plan
  • CVE-2026-76657Authentication Bypass in HPE Networking Fabric Composer API allows Administrative Access
    40Plan
  • CVE-2026-19766Authentication Bypass leads to Administrative control of adjacent network hosts in HPE Networking Fabric Composer
    38Monitor
  • CVE-2026-73701Unauthenticated Remote Code Execution in HPE Networking Fabric Composer
    36Monitor
  • CVE-2026-73700Authenticated Stored Cross-Site Scripting Vulnerability (XSS) in HPE Networking Fabric Composer Web-Based Management Interface
    36Monitor
  • CVE-2026-73705Authenticated Arbitrary File Write leads to Remote Code Execution in HPE Networking Fabric Composer
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-737120 days apartUnauthenticated Remote Code Execution in HPE Networking Fabric Composer API
    32Monitor
  • CVE-2026-737160 days apartUnauthenticated Remote Code Execution in HPE Networking Fabric Composer
    30Monitor
  • CVE-2026-737170 days apartUnauthenticated Command Injection Vulnerability in HPE Networking Fabric Composer Web-Based Management Interface
    30Monitor
  • CVE-2026-737200 days apartAuthenticated Insecure File Handling allows Remote Code Execution in HPE Networking Fabric Composer API
    28Monitor
  • CVE-2026-737220 days apartAuthenticated Command Injection Vulnerabilities in HPE Networking Fabric Composer Web-Based Management Interface
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Adjacent
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
const host = req.body.host;exec("ping -c 1 " + host, onResult);

Fixed

ts
const host = req.body.host;if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records