How severe is CVE-2022-28758?

CVE-2022-28758 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2022-28758 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-28758?

CVE-2022-28758 affects Zoom Zoom On-premise Meeting Connector Mmr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-28758?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-28758 published?

CVE-2022-28758 was published on 2022-09-16 and last updated on 2026-06-17.

CVE-2022-28758

CVE-2022-28758 is a high-severity vulnerability in Zoom Zoom On-premise Meeting Connector Mmr with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Zoom Zoom On-premise Meeting Connector Mmr
Published: 2022-09-16
Last modified: 2026-06-17

Description

Zoom On-Premise Meeting Connector MMR before version 4.8.20220815.130 contains an improper access control vulnerability. As a result, a malicious actor could obtain the audio and video feed of a meeting they were not authorized to join and cause other meeting disruptions.

Frequently asked questions

What is CVE-2022-28758?: Zoom On-Premise Meeting Connector MMR before version 4.8.20220815.130 contains an improper access control vulnerability. As a result, a malicious actor could obtain the audio and video feed of a meeting they were not authorized to join and cause other meeting disruptions.
How severe is CVE-2022-28758?: CVE-2022-28758 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2022-28758 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-28758?: CVE-2022-28758 affects Zoom Zoom On-premise Meeting Connector Mmr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-28758?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-28758 published?: CVE-2022-28758 was published on 2022-09-16 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:zoom:zoom_on-premise_meeting_connector_mmr:*:*:*:*:*:*:*:*

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