CVE-2026-73726: A vulnerability has been identified in the underlying operating system of HPE Networking Fabric Composer that

Q: How do I fix CVE-2026-73726?

fabric composer: upgrade to 7.3.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-73726 being exploited?

CVE-2026-73726 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-73726 affect?

CVE-2026-73726 affects fabric composer. Severity is medium (CVSS 6.8). A vulnerability has been identified in the underlying operating system of HPE Networking Fabric Composer that could potentially allow an unauthenticated adjacent actor to circumvent existing authentication controls. Successful exploitation

Q: How urgent is CVE-2026-73726?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 6.8UPGRADE

CVE-2026-73726 is a medium-severity flaw (CVSS 6.8) affecting fabric composer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been identified in the underlying operating system of HPE Networking Fabric Composer that could potentially allow an unauthenticated adjacent actor to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain administrative access, modify system configurations, and access or manipulate sensitive data.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-306, CWE-287
Published	2026-09-01
Last modified	2026-09-02

Publisher (CNA): Hewlett Packard Enterprise (HPE) · Vendor: arubanetworks

Last updated 2026-09-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-01 20:17 UTCPublished CVE record published
2026-09-02 16:17 UTCUpdated Record last modified

arubanetworks fabric composer UPGRADE

Affected: < 7.3.4

Fixed in: 7.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fabric-composer || rpm -q fabric-composer || fabric-composer --version

2. UPGRADE to 7.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fabric-composer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fabric-composer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-73726?

fabric composer: upgrade to 7.3.4. Exact commands for each OS are on this page.

Is CVE-2026-73726 being exploited?

CVE-2026-73726 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-73726 affect?

CVE-2026-73726 affects fabric composer. Severity is medium (CVSS 6.8). A vulnerability has been identified in the underlying operating system of HPE Networking Fabric Composer that could potentially allow an unauthenticated adjacent actor to circumvent existing authentication controls. Successful exploitation

How urgent is CVE-2026-73726?

Priority 28/100. No elevated risk signals yet.

Related CVEs

CVE-2026-19766 CRITICAL 9.6 UPGRADE An authentication bypass vulnerability exists in the underlying operating system of HPE Networking Fabric Comp
CVE-2026-73712 HIGH 8.1 UPGRADE A vulnerability in the API of HPE Networking Fabric Composer could allow an unauthenticated remote attacker to
CVE-2026-73728 MEDIUM 6.5 UPGRADE Denial-of-service vulnerabilities exist in the API of HPE Networking Fabric Composer that could allow an authe
CVE-2026-73729 MEDIUM 6.5 UPGRADE A vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an authentica
CVE-2026-73730 MEDIUM 6.5 UPGRADE A privilege escalation vulnerability exists in the API of HPE Networking Fabric Composer

References

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