# CVE-2026-73783: Authenticated Stack Overflow Vulnerabilities lead to Denial-of-Service in AOS-CX

> An authenticated attacker can trigger a stack overflow in an API endpoint, causing a denial-of-service condition on HPE AOS-CX network devices.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2026
- **Updated:** 2 Sep 2026
- **Also known as:** GHSA-mfg8-9hq6-x4x4

## What is CVE-2026-73783?

CVE-2026-73783 is a medium-severity denial of service vulnerability in Hpe Arubaos-Cx, published on 1 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Stack overflow vulnerabilities exist in an API endpoint of AOS-CX. Successful exploitation could allow an authenticated malicious actor to cause a denial-of-service condition on the affected system.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-73783?

It affects 1 product.


Products: Hpe Arubaos-Cx.

## How do I fix CVE-2026-73783?

No fix has been published for CVE-2026-73783 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73783 being exploited?

There is no known exploitation of CVE-2026-73783 in the wild and no public exploit code.

## Other vulnerabilities in Hpe Arubaos-Cx

- [CVE-2026-73749](https://insights.sbomify.com/CVE-2026-73749/): Unauthenticated Buffer Overflow Vulnerabilities lead to Remote Code Execution in AOS-CX (critical 9.8)
- [CVE-2026-23813](https://insights.sbomify.com/CVE-2026-23813/): Authentication Bypass in Web Interface allows Unauthenticated Admin Password Reset (critical 9.8)
- [CVE-2026-73750](https://insights.sbomify.com/CVE-2026-73750/): Authenticated Buffer Overflow Vulnerabilities in AOS-CX API Endpoint Leads to Possible Code Execution (high 8.8)
- [CVE-2026-73751](https://insights.sbomify.com/CVE-2026-73751/): Authenticated Remote Command Injection in AOS-CX Web-based Management Interface (high 8.8)
- [CVE-2026-73752](https://insights.sbomify.com/CVE-2026-73752/): Unauthenticated Arbitrary File Write Vulnerability Leads to Remote Code Execution in AOS-CX (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73783 and fix it if it is affected.

What it is: CVE-2026-73783 is a medium-severity denial of service vulnerability in Hpe Arubaos-Cx, published on 1 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-73783 in the wild and no public exploit code.

Affected product: Hpe Arubaos-Cx. 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-2026-73783/ (Markdown: https://insights.sbomify.com/CVE-2026-73783/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73783
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73783
- OSV: https://osv.dev/vulnerability/CVE-2026-73783

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73783/
Summaries are generated and may contain mistakes; the official description above is the record.