CVE-2025-64991Network attack vector

Elevated command execution via unvalidated instruction input

Published Dec 11, 2025 · Updated Dec 11, 2025

Command injection in TeamViewer DEX's 1E-PatchInsights-Deploy instruction before 15 allows remote authenticated users to run elevated commands. The instruction accepts attacker-controlled parameter values without sufficient validation and incorporates them into commands executed on connected devices. Exploitation requires Actioner privileges and approval of the crafted instruction by a separate highly privileged user.

CVSS severity6.8
Medium
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in TeamViewer DEX's 1E-PatchInsights-Deploy instruction before 15 allows remote authenticated users to run elevated commands. The instruction accepts attacker-controlled parameter values without sufficient validation and incorporates them into commands executed on connected devices. Exploitation requires Actioner privileges and approval of the crafted instruction by a separate highly privileged user.

The record

CVE
CVE-2025-64991
Published
Dec 11, 2025
Updated
Dec 11, 2025
Vendor
TeamViewer
Product
TeamViewer DEX
Classifications
CWE-20, CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 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=0 <15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TeamViewer · TeamViewer DEXversion=0 <15

Published CVSS scores

7.2NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.8TeamViewer Germany GmbHCVSS:3.1/AV:N/AC:L/PR:H/UI:R/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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