# CVE-2026-20302: Cisco RoomOS Stack Overflow Vulnerability

> An attacker with physical access can execute arbitrary code with root privileges via a malicious USB device due to a buffer overflow in the USB driver.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/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:** 19 Aug 2026
- **Updated:** 20 Aug 2026
- **Also known as:** GHSA-924p-6p4h-89mg

## What is CVE-2026-20302?

CVE-2026-20302 is a medium-severity memory corruption vulnerability in Cisco RoomOS Software, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the USB driver of Cisco RoomOS could allow an unauthenticated, local attacker with physical access to the USB port on an affected device to execute arbitrary code with root privileges.

This vulnerability is due to insufficient boundary checks for specific data that is provided through the USB driver. An attacker could exploit this vulnerability by connecting a malicious USB device to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system and execute arbitrary code with root privileges.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-20302?


## How do I fix CVE-2026-20302?

No fix has been published for CVE-2026-20302 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20302 being exploited?

There is no known exploitation of CVE-2026-20302 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20302 and fix it if it is affected.

What it is: CVE-2026-20302 is a medium-severity memory corruption vulnerability in Cisco RoomOS Software, published on 19 Aug 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-2026-20302 in the wild and no public exploit code.

Affected product: Cisco RoomOS Software. 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-2026-20302/ (Markdown: https://insights.sbomify.com/CVE-2026-20302/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20302
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20302
- OSV: https://osv.dev/vulnerability/CVE-2026-20302

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20302/
Summaries are generated and may contain mistakes; the official description above is the record.