Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace before version 7
Description
Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace before version 7
AI Analyst Comment
Remediation
Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs.
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VENDOR: Zoom
PRODUCT: Workplace
AFFECTED_VERSIONS: Zoom Workplace before version 7.0.4 for Android and before version 7.0.3 for iOS.
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Description Summary:
A privilege escalation vulnerability exists in the Zoom Workplace custom URL scheme handler, allowing unauthenticated network-based attackers to elevate their access rights.
Executive Summary:
An improper authorization vulnerability in the Zoom Workplace URL scheme allows unauthenticated network attackers to escalate privileges within the application.
Vulnerability Details
CVE-ID: CVE-2026-53408
Affected Software: Zoom Workplace
Affected Versions: Zoom Workplace before version 7.0.4 for Android and before version 7.0.3 for iOS.
Vulnerability: This is an improper authorization vulnerability in the handler for the custom URL scheme. An unauthenticated attacker with network access can exploit this flaw to escalate privileges within the application.
Business Impact
The CVSS score of 8.1 underscores the critical nature of this privilege escalation flaw. If exploited, an attacker could gain unauthorized administrative or elevated access, resulting in potential data theft, session hijacking, and compromise of communication integrity within the organization.
Remediation Plan
Immediate Action: Update all instances of Zoom Workplace to version 7.0.4 for Android or 7.0.3 for iOS.
Proactive Monitoring: Review enterprise mobile logs for anomalous activity or unexpected URL scheme calls that deviate from standard user behavior.
Compensating Controls: Utilize endpoint security controls to monitor and restrict the execution of custom URL schemes that are not explicitly required for business operations.
Exploitation Status
Public Exploit Available: false
Analyst Notes: As of June 14, 2026, there is no public information indicating active exploitation of this vulnerability. However, due to the nature of the flaw, the potential for exploitation is high.
Analyst Recommendation
Given the potential for privilege escalation, it is imperative to enforce the update to the latest versions of Zoom Workplace across all mobile devices. Security teams should prioritize this deployment to prevent unauthorized escalation and ensure platform integrity.