CVE-2021-34417: Zoom On-Premise Meeting Connector Controller

High severity, CVSS 7.2. EPSS: 1.2% chance of exploitation in the next 30 days.

The network proxy page on the web portal for the Zoom On-Premise Meeting Connector Controller before version 4.6.365.20210703, Zoom On-Premise Meeting Connector MMR before version 4.6.365.20210703, Zoom On-Premise Recording Connector before version 3.8.45.20210703, Zoom On-Premise Virtual Room Connector before version 4.4.6868.20210703, and Zoom On-Premise Virtual Room Connector Load Balancer before version 2.5.5496.20210703 fails to validate input sent in requests to set the network proxy password. This could lead to remote command injection by a web portal administrator.

Affected products

• Zoom Zoom On-Premise Meeting Connector Controller: before 4.6.365.20210703 (fixed in 4.6.365.20210703)
• Zoom Zoom On-Premise Meeting Connector Mmr: before 4.6.365.20210703 (fixed in 4.6.365.20210703)
• Zoom Zoom On-Premise Recording Connector: before 3.8.45.20210703 (fixed in 3.8.45.20210703)
• Zoom Zoom On-Premise Virtual Room Connector: before 4.4.6868.20210703 (fixed in 4.4.6868.20210703)
• Zoom Zoom On-Premise Virtual Room Connector Load Balancer: before 2.5.5496.20210703 (fixed in 2.5.5496.20210703)

Published 2021-11-11. Last modified 2026-06-17.