Improper input validation in Zoom on-premise Meeting Connector Controller, Zoom…
Priority LOW 35CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The network proxy page on the web portal for the Zoom on-premise Meeting Connector Controller before version 4.6.348.20201217, Zoom on-premise Meeting Connector MMR before version 4.6.348.20201217, Zoom on-premise Recording Connector before version 3.8.42.20200905, Zoom on-premise Virtual Room Connector before version 4.4.6620.20201110, and Zoom on-premise Virtual Room Connector Load Balancer before version 2.5.5495.20210326 fails to validate input sent in requests to update the network proxy configuration, which could lead to remote command injection on the on-premise image by a web portal administrator.
Why it matters now
EPSS 0.01516 74th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Zoom on-premise Meeting Connector Controller, Zoom on-premise Meeting Connector MMR, Zoom on-premise Recording Connector, Zoom on-premise Virtual Room Connector, Zoom on-premise Virtual Room Connector Load Balancer | Zoom on-premise Meeting Connector Controller before version 4.6.348.20201217, Zoom on-premise Meeting Connector MMR before version 4.6.348.20201217, Zoom on-premise Recording Connector before version 3.8.42.20200905, Zoom on-premise Virtual Room Connector before version 4.4.6620.20201110, Zoom on-premise Virtual Room Connector Load Balancer before version 2.5.5495.20210326 | — | No fix listed | CNA |
- Zoom on-premise Meeting Connector Controller, Zoom on-premise Meeting Connector MMR, Zoom on-premise Recording Connector, Zoom on-premise Virtual Room Connector, Zoom on-premise Virtual Room Connector Load Balancer Vendor— Affected Zoom on-premise Meeting Connector Controller before version 4.6.348.20201217, Zoom on-premise Meeting Connector MMR before version 4.6.348.20201217, Zoom on-premise Recording Connector before version 3.8.42.20200905, Zoom on-premise Virtual Room Connector before version 4.4.6620.20201110, Zoom on-premise Virtual Room Connector Load Balancer before version 2.5.5495.20210326 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zoom:meeting_connector:*:*:*:*:*:*:*:* | before 4.6.348.20201217 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:a:zoom:recording_connector:*:*:*:*:*:*:*:* | before 3.8.42.20200905 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:a:zoom:virtual_room_connector:*:*:*:*:*:*:*:* | before 4.4.6620.20201110 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:a:zoom:virtual_room_connector_load_balancer:*:*:*:*:*:*:*:* | before 2.5.5495.20210326 | Vulnerable | Zoom Video Communications, Inc. |
- cpe:2.3:a:zoom:meeting_connector:*:*:*:*:*:*:*:* Versions before 4.6.348.20201217 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:a:zoom:recording_connector:*:*:*:*:*:*:*:* Versions before 3.8.42.20200905 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:a:zoom:virtual_room_connector:*:*:*:*:*:*:*:* Versions before 4.4.6620.20201110 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:a:zoom:virtual_room_connector_load_balancer:*:*:*:*:*:*:*:* Versions before 2.5.5495.20210326 Vulnerable ·Zoom Video Communications, Inc.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34414
- 2026-10-03 Alias added: GHSA-4mhf-4583-3f4h
References
More Zoom Video Communications, Inc. Meeting Connector vulnerabilities
- TI-2022-11380 Zoom On-Premise Deployments: Stack Buffer Overflow in Meeting Connector CVSS 3.1CRITICAL 9.8
- TI-2021-13450 Improper input validation in Zoom On-Premise Meeting Connector Controller, Zoom… CVSS 3.1CRITICAL 9.8
- TI-2021-13449 Resource allocation without limits in Zoom On-Premise Meeting Connector Controller CVSS 3.1HIGH 7.5
- TI-2022-11384 Zoom On-Premise Deployments: Improper Access Control Vulnerability CVSS 3.1HIGH 7.1
- TI-2022-11383 Zoom On-Premise Deployments: Improper Access Control Vulnerability CVSS 3.1HIGH 7.1
Sources
- CVE-2021-34414 · CVE Program
- CVE-2021-34414 · NVD
- FIRST EPSS
- GHSA-4mhf-4583-3f4h · GitHub Advisory Database · CC BY 4.0
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