Zoom On-Premise Deployments: Improper Access Control
Priority LOW 30CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.
Summary
Zoom On-Premise Meeting Connector MMR before version 4.8.20220916.131 contains an improper access control vulnerability. As a result, a malicious actor in a meeting or webinar they are authorized to join could prevent participants from receiving audio and video causing meeting disruptions.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00764 55th percentileScored 2026-11-07
Fix Fixed Zoom On-Premise Meeting Connector MMR (Zoom Video Communications Inc): 4.8.20220916.131
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Zoom Video Communications, Inc. | Zoom On-Premise Meeting Connector MMR | before 4.8.20220916.131 | 4.8.20220916.131 | Patch available | CNA |
- Zoom On-Premise Meeting Connector MMR VendorZoom Video Communications, Inc. Affected before 4.8.20220916.131 Fixed in 4.8.20220916.131 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zoom:zoom_on-premise_meeting_connector_mmr:*:*:*:*:*:*:*:* | before 4.8.20220916.131 | Vulnerable | Zoom Video Communications, Inc. |
- cpe:2.3:a:zoom:zoom_on-premise_meeting_connector_mmr:*:*:*:*:*:*:*:* Versions before 4.8.20220916.131 Vulnerable ·Zoom Video Communications, Inc.
Remediation
- Fix · CNA Zoom On-Premise Meeting Connector MMR (Zoom Video Communications Inc) Fixed in 4.8.20220916.131
Timeline
- 2026-10-02 Threatist record created from CVE-2022-28761
- 2026-10-03 Alias added: GHSA-535x-2h8c-88m2
References
More Zoom Video Communications, Inc. Zoom On-premise Meeting Connector Mmr vulnerabilities
- TI-2021-13457 Buffer overflow in Zoom client and other products CVSS 3.1CRITICAL 9.8
- TI-2022-11389 Zoom On-Premise Deployments: Improper Access Control CVSS 3.1HIGH 8.6
- TI-2022-11388 Zoom On-Premise Deployments: Improper Access Control CVSS 3.1HIGH 8.2
- TI-2021-13451 Authenticated remote command execution with root privileges via web console in MMR CVSS 3.1HIGH 7.9
- TI-2021-13458 Process memory exposure in Zoom Client and other products CVSS 3.1HIGH 7.5
- TI-2022-07032 Process memory exposure in Zoom on-premise Meeting services CVSS 3.1HIGH 7.5
Sources
- CVE-2022-28761 · CVE Program
- CVE-2022-28761 · NVD
- FIRST EPSS
- GHSA-535x-2h8c-88m2 · GitHub Advisory Database · CC BY 4.0
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