Auth bypass in Arubanetworks Fabric Composer

CVE-2026-73727

Vulnerabilities in the API of HPE Networking Fabric Composer could allow an authenticated low privilege operator user to access sensitive information. A successful exploit allows an attacker to access data beyond what is authorized by the user's existing privilege level, which could be used to potentially gain further access to network services supported by HPE Networking Fabric Composer.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-73727: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-73727?
CVE-2026-73727 is a medium-severity vulnerability in Arubanetworks Fabric Composer, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-09-01.
How severe is CVE-2026-73727?
Medium severity. CVSS v3 base score is 6.5 out of 10.