CVE-2026-76721: Hewlett Packard Enterprise HPE Instant On

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Hewlett Packard Enterprise HPE Instant On: from 0.0.0.0, up to and including 3.4.1.0

Published 2026-09-29. Last modified 2026-09-30.