How severe is CVE-2021-34414?

CVE-2021-34414 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-34414 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34414?

CVE-2021-34414 primarily affects Zoom Meeting Connector. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-34414?

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-2021-34414 published?

CVE-2021-34414 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-34414

CVE-2021-34414 is a high-severity vulnerability in Zoom Meeting Connector with a CVSS 3.x base score of 7.2. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Zoom Meeting Connector
Published: 2021-09-27
Last modified: 2026-06-17

Description

The network proxy page on the web portal for the Zoom on-premise Meeting Connector Controller before version 4.6.348.20201217, Zoom on-premise Meeting Connector MMR before version 4.6.348.20201217, Zoom on-premise Recording Connector before version 3.8.42.20200905, Zoom on-premise Virtual Room Connector before version 4.4.6620.20201110, and Zoom on-premise Virtual Room Connector Load Balancer before version 2.5.5495.20210326 fails to validate input sent in requests to update the network proxy configuration, which could lead to remote command injection on the on-premise image by a web portal administrator.

Frequently asked questions

What is CVE-2021-34414?: The network proxy page on the web portal for the Zoom on-premise Meeting Connector Controller before version 4.6.348.20201217, Zoom on-premise Meeting Connector MMR before version 4.6.348.20201217, Zoom on-premise Recording Connector before version 3.8.42.20200905, Zoom on-premise Virtual Room Connector before version 4.4.6620.20201110, and Zoom on-premise Virtual Room Connector Load Balancer before version 2.5.5495.20210326 fails to validate input sent in requests to update the network proxy configuration, which could lead to remote command injection on the on-premise image by a web portal administrator.
How severe is CVE-2021-34414?: CVE-2021-34414 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-34414 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34414?: CVE-2021-34414 primarily affects Zoom Meeting Connector. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-34414?: 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-2021-34414 published?: CVE-2021-34414 was published on 2021-09-27 and last updated on 2026-06-17.

References

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

Affected products (4)

cpe:2.3:a:zoom:meeting_connector:*:*:*:*:*:*:*:*
cpe:2.3:a:zoom:recording_connector:*:*:*:*:*:*:*:*
cpe:2.3:a:zoom:virtual_room_connector:*:*:*:*:*:*:*:*
cpe:2.3:a:zoom:virtual_room_connector_load_balancer:*:*:*:*:*:*:*:*

More vulnerabilities in Zoom Meeting Connector

CVE-2021-34416 — Critical (CVSS 9.8): The network address administrative settings web portal for the Zoom on-premise Meeting Connector before version…
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CVE-2022-28754 — High (CVSS 7.1): Zoom On-Premise Meeting Connector MMR before version 4.8.129.20220714 contains an improper access control…
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