How severe is CVE-2026-76731?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Hewlett Packard Enterprise (HPE) Instant On

CVE-2026-76731

An authentication bypass vulnerability in the captive portal of HPE Networking Instant On could allow an unauthenticated remote attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain limited access to some data and to make limited changes within the affected component.

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

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

Hewlett Packard Enterprise (HPE) Instant On

References

support.hpe.com/hpesc/public/docDisplay

Frequently asked questions

What is CVE-2026-76731?: CVE-2026-76731 is a medium-severity vulnerability in Hewlett Packard Enterprise (HPE) Instant On. CVSS score: 6.5/10. Published 2026-09-29.
How severe is CVE-2026-76731?: Medium severity. CVSS v3 base score is 6.5 out of 10.