CVE-2026-76731— Authentication Bypass in the Captive Portal of HPE Networking Instant On
Quick assessment
Affected
Hewlett Packard Enterprise (HPE) Instant ON
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
HPE Networking Instant On 的 captive portal（强制门户）中存在一个身份验证绕过漏洞，未经身份验证的远程攻击者可能利用该漏洞绕过现有的身份验证控制。成功利用此漏洞后，攻击者可能获得对部分数据的有限访问权限，并能在受影响组件内进行有限的更改。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Hewlett Packard Enterprise (HPE) | Instant ON | 0.0.0.0≤ 3.4.1.0 |
affected |
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I. Basic Information for CVE-2026-76731
Vulnerability Information
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Vulnerability Title
Authentication Bypass in the Captive Portal of HPE Networking Instant On
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Hewlett Packard Enterprise (HPE) | Instant ON | 0.0.0.0 ~ 3.4.1.0 | - |
|
II. Public POCs for CVE-2026-76731
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-76731 (1)
Same Patch Batch · Hewlett Packard Enterprise (HPE) · 2026-09-29 · 18 CVEs total
| CVE-2026-76722 | 9.8 CRITICAL | Uncontrolled Format String Vulnerabilities lead to Remote Code Execution or Denial-of-Serv |
| CVE-2026-76721 | 9.8 CRITICAL | Unauthenticated Buffer Overflow Vulnerability leads to Remote Code Execution in HPE Networ |
| CVE-2026-76725 | 9.6 CRITICAL | Authentication Bypass in a Management Protocol of HPE Networking Instant ON APs |
| CVE-2026-76724 | 9.6 CRITICAL | Unauthenticated Adjacent Command Injection Vulnerability in HPE Networking Instant ON APs |
| CVE-2026-76723 | 9.6 CRITICAL | Unauthenticated Adjacent Buffer Overflow Vulnerabilities lead to Remote Code Execution in |
| CVE-2026-76726 | 8.1 HIGH | Authentication Bypass Leading to Unauthorized Network Access in HPE Networking Instant ON |
| CVE-2026-76727 | 7.2 HIGH | Authenticated Command Injection Vulnerabilities in HPE Networking Instant ON |
| CVE-2026-76728 | 7.2 HIGH | Authenticated Server-Side Request Forgery Leading to Remote Code Execution in HPE Networki |
| CVE-2026-76729 | 6.6 MEDIUM | Authenticated Format String Vulnerability allows Memory Corruption in HPE Networking Insta |
| CVE-2026-76730 | 6.5 MEDIUM | Improper PAPI Packet handling leads to unauthorized access in HPE Networking Instant ON AP |
| CVE-2026-76732 | 6.4 MEDIUM | Authenticated Local Privilege Escalation Vulnerability in a Daemon of HPE Networking Insta |
| CVE-2026-76733 | 4.9 MEDIUM | Authenticated Denial-of-Service Vulnerability in HPE Networking Instant On API Endpoint |
| CVE-2026-76734 | 4.8 MEDIUM | Unauthenticated Memory Corruption Vulnerability leads to Denial-of-Service in HPE Networki |
| CVE-2026-76735 | 4.1 MEDIUM | Authenticated Local Sensitive Information Disclosure in HPE Networking Instant On |
| CVE-2026-76736 | 3.3 LOW | Authenticated Local Buffer Overflow Vulnerability leads to Denial-of-Service in HPE Networ |
| CVE-2026-76737 | 3.0 LOW | Authenticated Local Path Traversal Vulnerability Leads to Denial-of-Service in HPE Network |
| CVE-2026-76738 | 2.7 LOW | Authenticated Buffer Overflow Vulnerability in the API Endpoint of HPE Networking Instant |
IV. Related Vulnerabilities
Same product: Instant ON
-
CVE-2026-76738
Authenticated Buffer Overflow Vulnerability in the API Endpo -
CVE-2026-76737
Authenticated Local Path Traversal Vulnerability Leads to De -
CVE-2026-76736
Authenticated Local Buffer Overflow Vulnerability leads to D -
CVE-2026-76735
Authenticated Local Sensitive Information Disclosure in HPE -
CVE-2026-76734
Unauthenticated Memory Corruption Vulnerability leads to Den
Same vendor: Hewlett Packard Enterprise (HPE)
-
CVE-2026-76738
Authenticated Buffer Overflow Vulnerability in the API Endpo -
CVE-2026-76737
Authenticated Local Path Traversal Vulnerability Leads to De -
CVE-2026-76736
Authenticated Local Buffer Overflow Vulnerability leads to D -
CVE-2026-76735
Authenticated Local Sensitive Information Disclosure in HPE -
CVE-2026-76734
Unauthenticated Memory Corruption Vulnerability leads to Den
V. Comments for CVE-2026-76731
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