CVE-2026-76738— Authenticated Buffer Overflow Vulnerability in the API Endpoint of HPE Networking Instant On Causes Denial-of-Service
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 API 端点中存在缓冲区溢出漏洞，可能导致拥有管理员权限的已认证攻击者造成拒绝服务（DoS）。成功利用该漏洞可使攻击者中断受影响服务的正常运行，但该服务会在无需人工干预的情况下自动恢复。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of ServiceAffected 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-2026-76738
Vulnerability Information
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Vulnerability Title
Authenticated Buffer Overflow Vulnerability in the API Endpoint of HPE Networking Instant On Causes Denial-of-Service
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overflow vulnerability exists in the API endpoint of HPE Networking Instant On that could allow an authenticated attacker with administrative privileges to cause a denial of service. Successful exploitation could allow an attacker to interrupt the normal operation of the affected service, which recovers without manual intervention.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
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-2026-76738
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-76738 (1)
Same Patch Batch · Hewlett Packard Enterprise (HPE) · 2026-09-29 · 18 CVEs total
| CVE-2026-76721 | 9.8 CRITICAL | Unauthenticated Buffer Overflow Vulnerability leads to Remote Code Execution in HPE Networ |
| CVE-2026-76722 | 9.8 CRITICAL | Uncontrolled Format String Vulnerabilities lead to Remote Code Execution or Denial-of-Serv |
| CVE-2026-76723 | 9.6 CRITICAL | Unauthenticated Adjacent Buffer Overflow Vulnerabilities lead to Remote Code Execution in |
| 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-2026-76726 | 8.1 HIGH | Authentication Bypass Leading to Unauthorized Network Access 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-2026-76727 | 7.2 HIGH | Authenticated Command Injection Vulnerabilities in HPE Networking Instant ON |
| 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-2026-76731 | 6.5 MEDIUM | Authentication Bypass in the Captive Portal of HPE Networking Instant On |
| 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 |
IV. Related Vulnerabilities
Same product: Instant ON
-
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 -
CVE-2026-76733
Authenticated Denial-of-Service Vulnerability in HPE Network
Same vendor: Hewlett Packard Enterprise (HPE)
-
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 -
CVE-2026-76733
Authenticated Denial-of-Service Vulnerability in HPE Network
V. Comments for CVE-2026-76738
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