# CVE-2026-76726: HPE Networking Instant ON authentication bypass in API endpoint

Source: https://junglewise.ai/threats/cve-2026-76726-an-authentication-bypass-vulnerability-in-the-api-endpoint-of-hpe  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-29. Updated: 2026-09-29  
License: CC BY 4.0 with a link back

CVE-2026-76726 · Severity: high · CVSS 8.1 · Published 2026-09-29

HPE Networking Instant ON is a cloud-managed networking solution that protects corporate network access. An unauthenticated attacker can bypass the API authentication controls, potentially gaining unauthorized access to restricted networks if specific network conditions are present. Successful exploitation could allow attackers to access sensitive network resources without credentials.

Technologies: [Hpe Networking Instant On](https://junglewise.ai/threats/technologies/networking-instant-on). Vendors: [Hpe](https://junglewise.ai/threats/vendors/hpe).

## Quick answers

**Is CVE-2026-76726 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76726 being exploited in the wild.

**How severe is CVE-2026-76726?** High severity, with a CVSS score of 8.1, published 29 September 2026.

**Which products and versions are affected?** HPE Networking Instant ON.

**Is there a fix for CVE-2026-76726?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76726 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-76726?** Check whether you run Hpe Networking Instant On. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An authentication bypass vulnerability exists in the API endpoint of HPE Networking Instant ON, allowing unauthenticated remote attackers to circumvent network access controls. The vulnerability requires certain preconditions outside the attacker's control to be met. Successful exploitation grants unauthorized access to restricted network resources.

## Affected products

- HPE Networking Instant ON

## Timeline

- 2026-09-29: disclosed

## References

- [https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05150en_us&docLocale=en_US](https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05150en_us&docLocale=en_US)

## Related threats

- [HPE Networking Instant On information disclosure in OS](https://junglewise.ai/threats/cve-2026-76735-a-sensitive-information-disclosure-vulnerability-exists-in-the)
- [HPE Networking Instant On memory corruption](https://junglewise.ai/threats/cve-2026-76734-a-memory-corruption-vulnerability-in-the-affected-interface-of)
- [HPE Networking Instant On API denial-of-service](https://junglewise.ai/threats/cve-2026-76733-a-denial-of-service-vulnerability-exists-in-the-api-endpoint-of)
- [HPE Networking Instant ON local privilege escalation in daemon](https://junglewise.ai/threats/cve-2026-76732-a-local-privilege-escalation-vulnerability-has-been-discovered-in)
- [HPE Networking Instant On authentication bypass in captive portal](https://junglewise.ai/threats/cve-2026-76731-an-authentication-bypass-vulnerability-in-the-captive-portal-of)