NVD / CVE Program· CNA hpe

CVE-2026-73728: Authenticated Denial of Service Vulnerabilities in HPE Networking Fabric Composer API

Noroxi assessment

Priority: Monitor (action score 26/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.42% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Denial-of-service vulnerabilities exist in the API of HPE Networking Fabric Composer that could allow an authenticated low privilege operator user to cause a denial of service. Successful exploitation could allow an attacker to interrupt the normal operation of the affected service.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded

Denial of service

EUVD-2026-69455

Published: Sep 1, 2026
Updated: Sep 3, 2026
EPSS: 0.4% · 36th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · hpe: 6.5; 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.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
arubanetworks	fabric composer	cpe:2.3:a:arubanetworks:fabric_composer

Affected versions

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

arubanetworks fabric composerup to 7.3.3 inclusive

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

Published before and after this one in the same product

← EarlierCVE-2026-73726Sep 1, 2026 · Authentication Bypass in HPE Networking Fabric Composer allows Unauthorized Administrative Access
27Monitor
← EarlierCVE-2026-73727Sep 1, 2026 · Authenticated Sensitive Information Disclosure in HPE Networking Fabric Composer API
26Monitor
Later →CVE-2026-73729Sep 1, 2026 · Authenticated Sensitive Information Disclosure in HPE Networking Fabric Composer
26Monitor

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.

internal security researchHPE Networking.reporter

Variant candidates

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

CVE-2026-737150 days apartUnauthenticated Denial-of-Service (DoS) Vulnerability in the API of HPE Networking Fabric Composer
30Monitor
CVE-2026-737440 days apartAuthenticated Denial of Service Vulnerability in HPE Networking Fabric Composer Web-Based Management Interface
14Monitor
CVE-2026-737460 days apartAuthenticated Denial of Service Vulnerability in HPE Networking Fabric Composer API
12Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-0966 · Sep 2, 2026(HPE Networking Fabric Composer Güvenlik Bildirimi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

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

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

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

References

support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05133en_us&docLocale=en_US

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

All records