# CVE-2026-76730: Improper PAPI Packet handling leads to unauthorized access in HPE Networking Instant ON APs

> An unauthenticated adjacent attacker can bypass authentication in HPE Instant ON APs to send unauthorized network traffic.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-ch2c-mfgg-5cgv

## What is CVE-2026-76730?

CVE-2026-76730 is a medium-severity authentication bypass vulnerability in Hewlett Packard Enterprise (HPE) Instant ON, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An authentication bypass vulnerability exists in the PAPI protocol of HPE Networking Instant ON APs that could allow an unauthenticated adjacent attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to circumvent certain existing authentication mechanisms and send unauthorized network traffic to the target device.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-76730?


## How do I fix CVE-2026-76730?

No fix has been published for CVE-2026-76730 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76730 being exploited?

There is no known exploitation of CVE-2026-76730 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76730 and fix it if it is affected.

What it is: CVE-2026-76730 is a medium-severity authentication bypass vulnerability in Hewlett Packard Enterprise (HPE) Instant ON, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-76730 in the wild and no public exploit code.

Affected product: Hewlett Packard Enterprise (HPE) Instant ON. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-76730/ (Markdown: https://insights.sbomify.com/CVE-2026-76730/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76730
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76730
- OSV: https://osv.dev/vulnerability/CVE-2026-76730

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-76730/
Summaries are generated and may contain mistakes; the official description above is the record.