Zoom Workplace for Android: Improper authorization in custom URL scheme handler
Summary
Zoom Workplace for Android before version 7.2.1 contains an improper authorization flaw (CWE-939) in the handler for custom URL schemes. According to the CVE record and the Zoom bulletin, an attacker with network access may be able to escalate privileges, which affects confidentiality and integrity. The attack preconditions are not settled: the description says an unauthenticated user can exploit it, while the CVSS vector in the CVE record requires low privileges. No evidence of active exploitation was found.
Affected
- Zoom Workplace for Android before 7.2.1 (per CVE record and ZSB-26019)
- Conflicting report: one source lists Android releases from 7.0.5 to before 7.2.0 as affected; not verified against the vendor bulletin
Fixed in
- Zoom Workplace for Android 7.2.1 or later (verify the exact threshold against ZSB-26019)
Workaround
- No documented workaround. Zoom recommends updating to the latest version.
- Unknown whether a configuration-level mitigation exists for the URL handler; do not assume one.
Exploitation
- Known exploited: no evidence found; not verified against the CISA KEV catalogue.
- Public proof of concept: none found.
- CISA SSVC assessment: exploitation none, automatable no, technical impact total.
Our recommendation
- Inventory Zoom Workplace on Android devices, both managed and private (BYOD).
- Update to 7.2.1 or later as soon as possible.
- If patching is delayed, restrict Zoom Workplace on mobile devices via MDM and monitor for unusual behaviour.
- Patch all Zoom clients, as several other high-severity Zoom issues were published in the same period.
- Watch for NVD analysis updates that clarify the authentication requirement.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Zoom Security Bulletin ZSB-26019 www.zoom.com
- Zoom Security Bulletins overview www.zoom.com
- PSIRT CVE record CVE-2026-53418 psirt.com
- Vulners CVE-2026-53418 vulners.com
- Cyberpress: Zoom patches four high-severity vulnerabilities cyberpress.org
- SecurityOnline: Zoom Workplace vulnerabilities October 2026 securityonline.info
- HOL Guard CVE-2026-53418 (CISA ADP Vulnrichment) hol.org
- OffSeq Radar CVE-2026-53418 radar.offseq.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 19:43.
Original description (NVD)
Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace for Android before version 7.2.1 may allow an unauthenticated user to conduct an escalation of privilege via network access.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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