Vulnerability in Hewlett Packard Enterprise (HPE) Instant On

CVE-2026-76721

Buffer overflow vulnerability exists in the affected interface of HPE Networking Instant ON that could allow an unauthenticated remote attacker to run arbitrary code on the underlying host. Successful exploitation could allow an attacker to execute arbitrary code as a privileged user on the underlying operating system.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

References

Frequently asked questions

What is CVE-2026-76721?
CVE-2026-76721 is a critical-severity vulnerability in Hewlett Packard Enterprise (HPE) Instant On. CVSS score: 9.8/10. Published 2026-09-29.
How severe is CVE-2026-76721?
Critical severity. CVSS v3 base score is 9.8 out of 10.