CVE-2026-30903Network attack vector

Privilege escalation via externally controlled Mail path

Published Mar 11, 2026 · Updated Mar 11, 2026

External file-path control in Zoom Workplace for Windows before 6.6.0 allows remote attackers to escalate privileges through the Mail feature. Zoom has not published which Mail code path accepts the externally controlled name or how that value reaches a privileged file operation. The attack requires no prior privileges and user interaction; Zoom has not bounded the resulting privilege level or exact file-system action.

CVSS severity9.6
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

External file-path control in Zoom Workplace for Windows before 6.6.0 allows remote attackers to escalate privileges through the Mail feature. Zoom has not published which Mail code path accepts the externally controlled name or how that value reaches a privileged file operation. The attack requires no prior privileges and user interaction; Zoom has not bounded the resulting privilege level or exact file-system action.

The record

CVE
CVE-2026-30903
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace
Classifications
CWE-73, CWE-610, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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=see references

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplaceversion=see references

Published CVSS scores

9.6Zoom Video Communications, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-73External Control of File Name or Path
CWE-610Externally Controlled Reference to a Resource in Another Sphere
T1068Exploitation for Privilege Escalation

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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