Quick answers
- Is CVE-2026-19766 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19766 being exploited in the wild.
- How severe is CVE-2026-19766?
- Critical severity, with a CVSS score of 9.6, published 1 September 2026.
- Which products and versions are affected?
- HPE Networking Fabric Composer.
- Is there a fix for CVE-2026-19766?
- 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-2026-19766 attacked?
- It is attacked from the adjacent network, in a network appliance.
- Am I affected by CVE-2026-19766?
- 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
This is an authentication bypass vulnerability in the underlying operating system of HPE Networking Fabric Composer. An unauthenticated adjacent attacker can exploit this flaw to achieve arbitrary code execution with privileged user rights on the OS layer. The attack vector is adjacent network access (same network segment), requiring no prior authentication. Successful exploitation results in complete compromise of the AFC host, including potential control over managed fabric infrastructure. Patches are expected to be available through HPE security advisories.
Affected products
- HPE Networking Fabric Composer
Timeline
- 2026-09-01: disclosed: CVE-2026-19766 published