CVE-2026-76738 Authenticated Buffer Overflow Vulnerability in the API Endpoint of HPE Networking Instant On Causes Denial-of-Service
An authenticated administrator can trigger a buffer overflow in the HPE Instant On API, causing a temporary denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76738?
CVE-2026-76738 is a low-severity memory corruption vulnerability in Hewlett Packard Enterprise (HPE) Instant ON, published on 29 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-119
Which versions are affected by CVE-2026-76738?
How do I fix CVE-2026-76738?
No fix has been published for CVE-2026-76738 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-76738 being exploited?
There is no known exploitation of CVE-2026-76738 in the wild and no public exploit code.
Sources
Also known as GHSA-qp54-2mv2-22hc.