How severe is CVE-2026-73701?

CVE-2026-73701 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-73701 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-73701?

CVE-2026-73701 affects Arubanetworks Fabric Composer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-73701?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-73701 published?

CVE-2026-73701 was published on 2026-09-01 and last updated on 2026-09-02.

CVE-2026-73701

CVE-2026-73701 is a critical-severity vulnerability in Arubanetworks Fabric Composer with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Arubanetworks Fabric Composer
Published: 2026-09-01
Last modified: 2026-09-02

Description

An unauthenticated remote code execution vulnerability exists in the underlying operating system of HPE Networking Fabric Composer and could be exploited if certain preconditions outside of the attacker's control are met. Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to execute arbitrary code as a privileged user on the underlying operating system, leading to complete compromise of the HPE Networking Fabric Composer host.

Frequently asked questions

What is CVE-2026-73701?: An unauthenticated remote code execution vulnerability exists in the underlying operating system of HPE Networking Fabric Composer and could be exploited if certain preconditions outside of the attacker's control are met. Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to execute arbitrary code as a privileged user on the underlying operating system, leading to complete compromise of the HPE Networking Fabric Composer host.
How severe is CVE-2026-73701?: CVE-2026-73701 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-73701 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-73701?: CVE-2026-73701 affects Arubanetworks Fabric Composer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-73701?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-73701 published?: CVE-2026-73701 was published on 2026-09-01 and last updated on 2026-09-02.

References

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

Affected products (1)

cpe:2.3:a:arubanetworks:fabric_composer:*:*:*:*:*:*:*:*

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