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CVE-2022-28754: Zoom On-Premise Deployments: Improper Access Control Vulnerability

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-11 · updated 2026-06-17
• Weakness: CWE-284

Description

Zoom On-Premise Meeting Connector MMR before version 4.8.129.20220714 contains an improper access control vulnerability. As a result, a malicious actor can join a meeting which they are authorized to join without appearing to the other participants, can admit themselves into the meeting from the waiting room, and can become host and cause other meeting disruptions.

Affected products

• Zoom Video Communications Inc Zoom On-Premise Meeting Connector Zone Controller (ZC): before 4.8.129.20220714 — fixed in 4.8.129.20220714

How to fix

Upgrade to a fixed version: Zoom Video Communications Inc Zoom On-Premise Meeting Connector Zone Controller (ZC) 4.8.129.20220714. Check the vendor advisory for mitigations.

References

• https://explore.zoom.us/en/trust/security/security-bulletin/
• https://explore.zoom.us/en/trust/security/security-bulletin/

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