CVE-2026-53408Network attack vector

Privilege escalation via unrestricted custom URL handler

Published Jun 12, 2026 · Updated Jun 12, 2026

Improper authorization in Zoom Workplace before 7.0.4 for Android and before 7.0.3 for iOS allows remote attackers to escalate privileges. The mobile client's custom URL-scheme handler fails to restrict which actors can invoke protected actions, but Zoom has not identified the handler or actions. A user must interact with attacker-controlled network content; Zoom has not disclosed which privileges or protected resources become accessible.

CVSS severity8.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Zoom Workplace before 7.0.4 for Android and before 7.0.3 for iOS allows remote attackers to escalate privileges. The mobile client's custom URL-scheme handler fails to restrict which actors can invoke protected actions, but Zoom has not identified the handler or actions. A user must interact with attacker-controlled network content; Zoom has not disclosed which privileges or protected resources become accessible.

The record

CVE
CVE-2026-53408
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace
Classifications
CWE-939, T1626
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplaceversion=0 <7.0.4

Published CVSS scores

8.1Zoom CommunicationsCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-939Improper Authorization in Handler for Custom URL Scheme
T1626Abuse Elevation Control Mechanism

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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