Resource allocation without limits in Zoom On-Premise Meeting Connector Controller
Priority LOW 35CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.
Summary
The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 does not verify the cnt field sent in incoming network packets, which leads to exhaustion of resources and system crash.
Why it matters now
EPSS 0.00978 62nd 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 | The Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 | — | No fix listed | CNA |
- Zoom On-Premise Meeting Connector Controller Vendor— Affected The Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zoom:meeting_connector:*:*:*:*:*:*:*:* | before 4.6.358.20210205 | Vulnerable | Zoom Video Communications, Inc. |
- cpe:2.3:a:zoom:meeting_connector:*:*:*:*:*:*:*:* Versions before 4.6.358.20210205 Vulnerable ·Zoom Video Communications, Inc.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34415
- 2026-10-03 Alias added: GHSA-736v-pj2q-r8qr
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-2021-13448 Improper input validation in Zoom on-premise Meeting Connector Controller, Zoom… CVSS 3.1HIGH 7.2
- 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-2021-34415 · CVE Program
- CVE-2021-34415 · NVD
- FIRST EPSS
- GHSA-736v-pj2q-r8qr · GitHub Advisory Database · CC BY 4.0
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