CVE-2022-22787: Insufficient hostname validation during Clusterswitch message in Zoom Client for Meetings

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-18 · updated 2026-06-17
Weakness: CWE-295

Description

The Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.10.0 fails to properly validate the hostname during a server switch request. This issue could be used in a more sophisticated attack to trick an unsuspecting users client to connect to a malicious server when attempting to use Zoom services.

Affected products

Zoom Workplace: before 5.10.0 — fixed in 5.10.0

How to fix

Upgrade to a fixed version: Zoom Workplace 5.10.0. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/167238/Zoom-XMPP-Stanza-Smuggling-Remote-Code-Execution.html
https://explore.zoom.us/en/trust/security/security-bulletin
http://packetstormsecurity.com/files/167238/Zoom-XMPP-Stanza-Smuggling-Remote-Code-Execution.html
https://explore.zoom.us/en/trust/security/security-bulletin

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