What’s Vulnerable › Vulnerabilities

CVE-2019-13449

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-07-09 · updated 2026-06-17
• Weakness: CWE-20

Description

In the Zoom Client before 4.4.2 on macOS, remote attackers can cause a denial of service (continual focus grabs) via a sequence of invalid launch?action=join&confno= requests to localhost port 19421.

Affected products

• Zoom Video Communications, Inc. Zoom Desktop Client for Windows: before 4.4.2 — fixed in 4.4.2

How to fix

Upgrade to a fixed version: Zoom Video Communications, Inc. Zoom Desktop Client for Windows 4.4.2. Check the vendor advisory for mitigations.

References

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

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