CVE-2026-76738

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Buffer Overflow in HPE Networking Instant On API

Publication date: 2026-09-29

Last updated on: 2026-09-30

Assigner: Hewlett Packard Enterprise (HPE)

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-29

Last Modified

2026-09-30

Generated

2026-10-19

AI Q&A

2026-09-29

EPSS Evaluated

2026-10-18

NVD

CVE-2026-76738

EUVD

EUVD-2026-89357

Affected Vendors & Products

Vendor	Product	Version / Range
hpe	networking_instant_on	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-119	The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

Executive Summary

This is a buffer overflow vulnerability in the API endpoint of HPE Networking Instant On. It allows an authenticated attacker with admin privileges to cause a denial of service by exploiting the buffer overflow, which can interrupt normal service operation. The service recovers automatically without manual intervention.

Detection Guidance

This vulnerability requires administrative privileges to exploit and primarily causes denial of service. Detection may involve monitoring for unusual API endpoint activity or service interruptions. Check HPE Networking Instant On logs for authentication failures or unexpected API calls. No specific commands are provided in the available context.

Impact Analysis

If exploited, this vulnerability could disrupt the availability of the HPE Networking Instant On service, leading to temporary outages or degraded performance. Since it requires admin privileges, the risk is limited to users with elevated access.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability allows an authenticated attacker with administrative privileges to cause a denial of service, which may indirectly affect availability requirements in these regulations.

Mitigation Strategies

Since this vulnerability requires administrative privileges and causes a denial of service that recovers automatically, ensure only trusted users have administrative access. Monitor API endpoint logs for unusual activity and apply any available patches from HPE.

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