# CVE-2019-1939: Cisco Webex Teams Logging Feature Command Execution Vulnerability

> Remote attackers can execute arbitrary commands on Windows systems by tricking users into visiting malicious websites that exploit Webex Teams logging features.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 5 Sep 2019
- **Updated:** 20 Nov 2024
- **Also known as:** GHSA-w3v7-95f2-5pgr

## What is CVE-2019-1939?

CVE-2019-1939 is a high-severity command injection vulnerability in Cisco Webex Teams, published on 5 Sep 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the Cisco Webex Teams client for Windows could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected system. This vulnerability is due to improper restrictions on software logging features used by the application on Windows operating systems. An attacker could exploit this vulnerability by convincing a targeted user to visit a website designed to submit malicious input to the affected application. A successful exploit could allow the attacker to cause the application to modify files and execute arbitrary commands on the system with the privileges of the targeted user.

Weakness: CWE-269 (Improper Privilege Management), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2019-1939?

It affects 1 product.


Products: Cisco Webex Teams.

## How do I fix CVE-2019-1939?

No fix has been published for CVE-2019-1939 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1939 being exploited?

There is no known exploitation of CVE-2019-1939 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Webex Teams

- [CVE-2025-20236](https://insights.sbomify.com/CVE-2025-20236/): Cisco Webex App Client-Side Remote Code Execution Vulnerability (high 8.8)
- [CVE-2018-0387](https://insights.sbomify.com/CVE-2018-0387/): Code injection in Cisco Webex Teams unknown (high 8.8)
- [CVE-2018-0436](https://insights.sbomify.com/CVE-2018-0436/): Cisco Webex Teams Information Disclosure and Modification Vulnerability (high 8.7)
- [CVE-2020-3535](https://insights.sbomify.com/CVE-2020-3535/): Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability (high 7.8)
- [CVE-2019-1636](https://insights.sbomify.com/CVE-2019-1636/): Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1939 and fix it if it is affected.

What it is: CVE-2019-1939 is a high-severity command injection vulnerability in Cisco Webex Teams, published on 5 Sep 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-1939 in the wild and no public exploit code.

Affected product: Cisco Webex Teams. 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-2019-1939/ (Markdown: https://insights.sbomify.com/CVE-2019-1939/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1939
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1939
- OSV: https://osv.dev/vulnerability/CVE-2019-1939

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1939/
Summaries are generated and may contain mistakes; the official description above is the record.