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CVE-2026-73777 – Authentication Bypass / Privilege Escalation – Aruba AOS-CX (10.10.x–10.18.x)

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Summary

CVE-2026-73777 is an authorization bypass vulnerability in the API endpoint of HPE Aruba Networking AOS-CX switches that could allow an unauthenticated remote actor to circumvent existing authentication controls. It affects multiple AOS-CX release trains and carries a CVSS v3.1 base score of 8.1 (High). The flaw was disclosed as part of HPE Security Bulletin HPESBNW05134, published September 1, 2026, alongside a broader set of AOS-CX vulnerabilities.

Technical details

  • Root cause: an authorization bypass in an AOS-CX API endpoint that fails to properly enforce authentication controls.
  • Trigger conditions: HPE describes the attack complexity as high, and no privileges or user interaction are required to exploit the flaw.
  • Attack vector: network-based, exploitable remotely against the exposed API endpoint.
  • Impact: successful exploitation can circumvent authentication controls, with HPE rating full impact to confidentiality, integrity, and availability of the switch.

Affected software

  • HPE Aruba Networking AOS-CX 10.18.0000 through 10.18.0001
  • HPE Aruba Networking AOS-CX 10.17.0000 through 10.17.1021
  • HPE Aruba Networking AOS-CX 10.16.0000 through 10.16.1051
  • HPE Aruba Networking AOS-CX 10.13.0000 through 10.13.1180
  • HPE Aruba Networking AOS-CX 10.10.0000 through 10.10.1180 (End of Maintenance branch)

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade to the fixed releases identified in HPESBNW05134 — AOS-CX 10.18.1002 and above, 10.17.1030 and above, 10.16.1060 and above, 10.13.1190 and above, or 10.10.1181 and above — obtained via the HPE Networking Support Portal.
  • If patching is not immediately possible: restrict the CLI and web-based management interfaces to a dedicated Layer 2 segment/VLAN, and/or control access with Layer 3+ firewall policies, along with accounting controls to track and log user activity, as recommended in the HPE advisory.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • (Signal details from the IONIX AOS-CX fingerprint plugin were not provided for this CVE, so no in-scope passive signals are listed here.)

References

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