# CVE-2026-76658: Unauthenticated Remote Code Execution in HPE Networking Fabric Composer SSH Daemon

> Unauthenticated remote attackers can bypass authentication in the SSH daemon to execute arbitrary commands with administrative privileges on HPE Fabric Composer hosts.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2026
- **Updated:** 1 Sep 2026
- **Also known as:** GHSA-p9f5-2p99-3r74

## What is CVE-2026-76658?

CVE-2026-76658 is a critical authentication bypass vulnerability in Arubanetworks Fabric Composer, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-76658?

It affects 1 product.


Products: Arubanetworks Fabric Composer.

## How do I fix CVE-2026-76658?

No fix has been published for CVE-2026-76658 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76658 being exploited?

There is no known exploitation of CVE-2026-76658 in the wild and no public exploit code.

## Other vulnerabilities in Arubanetworks Fabric Composer

- [CVE-2026-76657](https://insights.sbomify.com/CVE-2026-76657/): Authentication Bypass in HPE Networking Fabric Composer API allows Administrative Access (critical 10.0)
- [CVE-2026-19766](https://insights.sbomify.com/CVE-2026-19766/): Authentication Bypass leads to Administrative control of adjacent network hosts in HPE Networking Fabric Composer (critical 9.6)
- [CVE-2026-73700](https://insights.sbomify.com/CVE-2026-73700/): Cross-site scripting in Fabric Composer (critical 9.0)
- [CVE-2026-73701](https://insights.sbomify.com/CVE-2026-73701/): Unauthenticated Remote Code Execution in HPE Networking Fabric Composer (critical 9.0)
- [CVE-2026-73702](https://insights.sbomify.com/CVE-2026-73702/): Authenticated Privilege Escalation Vulnerability in the API of HPE Networking Fabric Composer (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76658 and fix it if it is affected.

What it is: CVE-2026-76658 is a critical authentication bypass vulnerability in Arubanetworks Fabric Composer, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-76658 in the wild and no public exploit code.

Affected product: Arubanetworks Fabric Composer. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-76658/ (Markdown: https://insights.sbomify.com/CVE-2026-76658/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76658
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76658
- OSV: https://osv.dev/vulnerability/CVE-2026-76658

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76658/
Summaries are generated and may contain mistakes; the official description above is the record.