---
id: CVE-2026-76731
title: >-
  An authentication bypass vulnerability in the captive portal of HPE Networking
  Instant On could allow an unauthenticated remote attacker to circumvent
  existing authentication controls
summary: >-
  An authentication bypass vulnerability in the captive portal of HPE Networking
  Instant On could allow an unauthenticated remote attacker to circumvent
  existing authentication controls. Successful exploitation could allow an
  attacker to g…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
vendor: Hewlett Packard Enterprise (HPE)
product: Instant ON
affected:
  - instant_on >= 0.0.0.0 <= 3.4.1.0
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T21:39:02.570'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76731'
references:
  - url: >-
      https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05150en_us&docLocale=en_US
    label: security-alert@hpe.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T19:44:04.153Z'
---

## Overview

An authentication bypass vulnerability in the captive portal of HPE Networking Instant On could allow an unauthenticated remote attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain limited access to some data and to make limited changes within the affected component.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.