CVE-2026-73709 Unauthenticated Remote Code Execution during HPE Networking Fabric Composer Installation Process

High 8.3 Published 1 Sep 2026 Updated 2 Sep 2026

Unauthenticated adjacent attackers can execute arbitrary commands on the underlying OS during installation if specific preconditions are met.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-73709?

CVE-2026-73709 is a high-severity command injection vulnerability in Arubanetworks Fabric Composer, published on 1 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-73709?

It affects 1 product.

Products include Arubanetworks Fabric Composer.

How do I fix CVE-2026-73709?

No fix has been published for CVE-2026-73709 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-73709 being exploited?

There is no known exploitation of CVE-2026-73709 in the wild and no public exploit code.

All Arubanetworks Fabric Composer vulnerabilities

Sources

Also known as GHSA-mx24-v3h3-7333.