CVE-2023-39209Network attack vector

Authenticated information disclosure through unintended UI action

Published Aug 8, 2023 · Updated Oct 4, 2024

Improper input validation in Zoom Desktop Client for Windows before 5.15.5 allows remote authenticated users to disclose information. Zoom identifies the weakness as an unintended interface action but has not disclosed the affected screen, control, input, or data exposed. Exploitation requires an authenticated network user, and Zoom reports no data-integrity effect; the exact information exposed remains undisclosed.

CVSS severity5.9
Medium
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in Zoom Desktop Client for Windows before 5.15.5 allows remote authenticated users to disclose information. Zoom identifies the weakness as an unintended interface action but has not disclosed the affected screen, control, input, or data exposed. Exploitation requires an authenticated network user, and Zoom reports no data-integrity effect; the exact information exposed remains undisclosed.

The record

CVE
CVE-2023-39209
Published
Aug 8, 2023
Updated
Oct 4, 2024
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace Desktop App
Classifications
CWE-449
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=before 5.15.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplace Desktop Appversion=before 5.15.5

Published CVSS scores

5.9Zoom Video Communications, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L
6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-449The UI Performs the Wrong Action

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo