How severe is CVE-2026-76658?

CVE-2026-76658 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-76658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-76658?

CVE-2026-76658 affects Arubanetworks Fabric Composer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-76658?

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-2026-76658 published?

CVE-2026-76658 was published on 2026-09-01 and last updated on 2026-09-02.

CVE-2026-76658

CVE-2026-76658 is a critical-severity vulnerability in Arubanetworks Fabric Composer with a CVSS 3.x base score of 10.0. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Arubanetworks Fabric Composer
Published: 2026-09-01
Last modified: 2026-09-02

Description

A vulnerability has been identified in the SSH daemon of HPE Networking Fabric Composer that could allow an unauthenticated remote attacker to gain administrative access to vulnerable AFC hosts. Successful exploitation could allow an attacker to execute arbitrary commands as a privileged user on the underlying operating system leading to complete system compromise.

Frequently asked questions

What is CVE-2026-76658?: A vulnerability has been identified in the SSH daemon of HPE Networking Fabric Composer that could allow an unauthenticated remote attacker to gain administrative access to vulnerable AFC hosts. Successful exploitation could allow an attacker to execute arbitrary commands as a privileged user on the underlying operating system leading to complete system compromise.
How severe is CVE-2026-76658?: CVE-2026-76658 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-76658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-76658?: CVE-2026-76658 affects Arubanetworks Fabric Composer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-76658?: 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-2026-76658 published?: CVE-2026-76658 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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