CVE-2022-28761 Zoom On-Premise Deployments: Improper Access Control

Medium 6.5 Published 14 Oct 2022 Updated 14 May 2025

A malicious participant in a Zoom On-Premise meeting can disrupt audio and video for others due to improper access control.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-28761?

CVE-2022-28761 is a medium-severity missing authorization vulnerability in Zoom On-Premise Meeting Connector MMR, published on 14 Oct 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-284

Which versions are affected by CVE-2022-28761?

It affects 1 product.

Products include Zoom Zoom On-Premise Meeting Connector Mmr.

How do I fix CVE-2022-28761?

No fix has been published for CVE-2022-28761 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2022-28761 being exploited?

There is no known exploitation of CVE-2022-28761 in the wild and no public exploit code.

Sources

Also known as GHSA-535x-2h8c-88m2.