# CVE-2026-76733: HPE Networking Instant On API denial-of-service

Source: https://junglewise.ai/threats/cve-2026-76733-a-denial-of-service-vulnerability-exists-in-the-api-endpoint-of  
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-2026-76733 · Severity: medium · CVSS 4.9 · Published 2026-09-29

HPE Networking Instant On is a cloud-managed networking platform for small and medium businesses. An authenticated attacker with administrative privileges can trigger a denial-of-service condition in the API endpoint, temporarily interrupting network management services until the system automatically recovers.

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-2026-76733 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76733 being exploited in the wild.

**How severe is CVE-2026-76733?** Medium severity, with a CVSS score of 4.9, published 29 September 2026.

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

**Is there a fix for CVE-2026-76733?** 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-2026-76733 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-76733?** 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

A denial-of-service vulnerability in the API endpoint of HPE Networking Instant On allows an authenticated attacker with administrative privileges to cause service interruption. The attack requires valid admin credentials and network access to the API endpoint. The service recovers automatically without manual intervention.

## 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 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)
- [HPE Networking Instant ON authentication bypass in PAPI protocol](https://junglewise.ai/threats/cve-2026-76730-an-authentication-bypass-vulnerability-exists-in-the-papi)