# CVE-2019-16000: Cisco Umbrella Roaming Client for Windows Install Vulnerability

> A local attacker can bypass security policies to install unapproved applications on Windows devices using the Cisco Umbrella Roaming Client.

- **Severity:** Medium 4.4 (`CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Sep 2020
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-4wjm-q2fq-94vj

## What is CVE-2019-16000?

CVE-2019-16000 is a medium-severity vulnerability in Cisco Umbrella Enterprise Roaming Client for Windows, published on 23 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the automatic update process of Cisco Umbrella Roaming Client for Windows could allow an authenticated, local attacker to install arbitrary, unapproved applications on a targeted device. The vulnerability is due to insufficient verification of the Windows Installer. An attacker could exploit this vulnerability by placing a file in a specific location in the Windows file system. A successful exploit could allow the attacker to bypass configured policy and install unapproved applications.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2019-16000?

It affects 1 product.


Products: Cisco Umbrella Roaming Client.

## How do I fix CVE-2019-16000?

No fix has been published for CVE-2019-16000 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-16000 being exploited?

There is no known exploitation of CVE-2019-16000 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-16000 and fix it if it is affected.

What it is: CVE-2019-16000 is a medium-severity vulnerability in Cisco Umbrella Enterprise Roaming Client for Windows, published on 23 Sep 2020. 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-2019-16000 in the wild and no public exploit code.

Affected product: Cisco Umbrella Enterprise Roaming Client for Windows. 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-2019-16000/ (Markdown: https://insights.sbomify.com/CVE-2019-16000/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-16000
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-16000
- OSV: https://osv.dev/vulnerability/CVE-2019-16000

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-16000/
Summaries are generated and may contain mistakes; the official description above is the record.