CVE-2025-64740

Local privilege escalation via improper signature verification

Published Nov 13, 2025 · Updated Nov 13, 2025

Improper signature verification in affected Zoom Workplace VDI Client for Windows releases allows local users to escalate privileges. Zoom has not disclosed which installer signature-validation step is incorrect or what untrusted package content passes verification. Exploitation requires authenticated local access, user interaction, and a complex attack; successful abuse grants elevated control over the Windows system.

CVSS severity7.5
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in affected Zoom Workplace VDI Client for Windows releases allows local users to escalate privileges. Zoom has not disclosed which installer signature-validation step is incorrect or what untrusted package content passes verification. Exploitation requires authenticated local access, user interaction, and a complex attack; successful abuse grants elevated control over the Windows system.

The record

CVE
CVE-2025-64740
Published
Nov 13, 2025
Updated
Nov 13, 2025
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace VDI Client
Classifications
CWE-347, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 2025Record 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 vectorlocal
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplace VDI Clientversion=see references

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Zoom Communications Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
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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