Quick answers
- Is CVE-2026-76658 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-76658 being exploited in the wild.
- How severe is CVE-2026-76658?
- Critical severity, with a CVSS score of 10, published 1 September 2026.
- Which products and versions are affected?
- HPE Networking Fabric Composer.
- Is there a fix for CVE-2026-76658?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-76658 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-76658?
- Check whether you run Arubanetworks Fabric Composer or Hpe Networking Fabric Composer. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The SSH daemon in HPE Networking Fabric Composer contains an authentication bypass vulnerability (CVE-2026-76658) that permits unauthenticated remote attackers to establish administrative sessions. The vulnerability is network-reachable and requires no user interaction or prior authentication. Successful exploitation grants attackers the ability to execute arbitrary commands with root privileges on the underlying operating system, achieving complete system compromise. The vulnerability has a CVSS score of 10.0 reflecting maximum severity across all metrics. Patches are expected to be available through HPE's support channels.
Affected products
- HPE Networking Fabric Composer
Timeline
- 2026-09-01: disclosed