Authentication Bypass Leading to Unauthorized Network Access in HPE Networking Instant ON API Endpoint

published 2026-09-29 last mo. modified 2026-10-01 last mo. also EUVD-2026-89345

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits: 0; none known

An authentication bypass vulnerability in the API endpoint of HPE Networking Instant ON could allow an unauthenticated remote attacker to bypass network access controls if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to obtain unauthorized access to restricted networks.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: last mo. (2026-09-30)

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Hewlett Packard Enterprise (HPE) Instant ON

Classification

Weakness

CWE-287 Improper Authentication

References

support.hpe.com /hpesc/public/docDisplay?docId=hpesbnw05150en_us&docLocale=en_US

Sources

CVE List CVE-2026-76726
NVD CVE-2026-76726

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