# CVE-2020-3336: Cisco TelePresence Collaboration Endpoint and RoomOS Software Command Injection Vulnerability

> Authenticated attackers can inject commands via the upgrade process to gain root access or cause denial of service on Cisco TelePresence devices.

- **Severity:** High 7.2 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:** 18 Jun 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-xm4r-pr55-hfw3

## What is CVE-2020-3336?

CVE-2020-3336 is a high-severity command injection vulnerability in Cisco TelePresence CE Software, published on 18 Jun 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability in the software upgrade process of Cisco TelePresence Collaboration Endpoint Software and Cisco RoomOS Software could allow an authenticated, remote attacker to modify the filesystem to cause a denial of service (DoS) or gain privileged access to the root filesystem. The vulnerability is due to insufficient input validation. An attacker with administrative privileges could exploit this vulnerability by sending requests with malformed parameters to the system using the console, Secure Shell (SSH), or web API. A successful exploit could allow the attacker to modify the device configuration or cause a DoS.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2020-3336?

It affects 2 products.


Products: Cisco Roomos, Cisco Telepresence Collaboration Endpoint.

## How do I fix CVE-2020-3336?

No fix has been published for CVE-2020-3336 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3336 being exploited?

There is no known exploitation of CVE-2020-3336 in the wild and no public exploit code.

## Other vulnerabilities in Cisco TelePresence CE Software

- [CVE-2026-20150](https://insights.sbomify.com/CVE-2026-20150/): Cisco RoomOS Security Hardening Release - Access Control Vulnerabilities (high 8.8)
- [CVE-2019-15288](https://insights.sbomify.com/CVE-2019-15288/): Cisco TelePresence Collaboration Endpoint, TelePresence Codec, and RoomOS Software Privilege Escalation Vulnerability (high 8.8)
- [CVE-2026-20156](https://insights.sbomify.com/CVE-2026-20156/): Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities (high 8.1)
- [CVE-2026-20153](https://insights.sbomify.com/CVE-2026-20153/): Cisco RoomOS Security Hardening Release - Input Validation Vulnerabilities (high 7.5)
- [CVE-2026-20157](https://insights.sbomify.com/CVE-2026-20157/): Cisco RoomOS Security Hardening Release - Missing Encryption Vulnerabilities (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3336 and fix it if it is affected.

What it is: CVE-2020-3336 is a high-severity command injection vulnerability in Cisco TelePresence CE Software, published on 18 Jun 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3336 in the wild and no public exploit code.

Affected product: Cisco TelePresence CE 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-2020-3336/ (Markdown: https://insights.sbomify.com/CVE-2020-3336/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3336
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3336
- OSV: https://osv.dev/vulnerability/CVE-2020-3336

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3336/
Summaries are generated and may contain mistakes; the official description above is the record.