CVE-2021-34418

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

The login routine of the web console in the Zoom On-Premise Meeting Connector before version 4.6.239.20200613, Zoom On-Premise Meeting Connector MMR before version 4.6.239.20200613, Zoom On-Premise Recording Connector before version 3.8.42.20200905, Zoom On-Premise Virtual Room Connector before version 4.4.6344.20200612, and Zoom On-Premise Virtual Room Connector Load Balancer before version 2.5.5492.20200616 fails to validate that a NULL byte was sent while authenticating. This could lead to a crash of the login service.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-476

Affected software

Vendor	Product	Versions
Zoom Video Communications Inc	Zoom On-Premise Meeting Connector	>= unspecified, < 4.6.239.20200613
Zoom Video Communications Inc	Zoom On-Premise Meeting Connector MMR	>= unspecified, < 4.6.239.20200613
Zoom Video Communications Inc	Zoom On-Premise Recording Connector	>= unspecified, < 3.8.42.20200905
Zoom Video Communications Inc	Zoom On-Premise Virtual Room Connector	>= unspecified, < 4.4.6344.20200612
Zoom Video Communications Inc	Zoom On-Premise Virtual Room Connector Load Balancer	>= unspecified, < 2.5.5492.20200616

References

https://explore.zoom.us/en/trust/security/security-bulletinVendor Advisory
https://explore.zoom.us/en/trust/security/security-bulletinVendor Advisory

Timeline

Published: Nov 11, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

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