CVE-2026-12703Network attack vector

Authenticated remote access via alternate unattended path

Published Jul 29, 2026 · Updated Jul 29, 2026

Authentication bypass in TeamViewer Full Client and Host for macOS before 15.80 allows remote authenticated users to establish remote sessions. The connection approval logic accepts Unattended Access as an alternate path around a configured 2FA for Connections approval flow. Exploitation requires device-management permissions for a pre-authenticated macOS device and does not bypass Conditional Access policies.

CVSS severity8.0
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in TeamViewer Full Client and Host for macOS before 15.80 allows remote authenticated users to establish remote sessions. The connection approval logic accepts Unattended Access as an alternate path around a configured 2FA for Connections approval flow. Exploitation requires device-management permissions for a pre-authenticated macOS device and does not bypass Conditional Access policies.

The record

CVE
CVE-2026-12703
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
TeamViewer
Product
TeamViewer ONE
Classifications
CWE-288, T1133
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=15.00 <15.80

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

TeamViewer · TeamViewer ONEversion=15.00 <15.80
TeamViewer · TeamViewer Remoteversion=15.00 <15.80
TeamViewer · TeamViewer Tensorversion=15.00 <15.80

Published CVSS scores

8.0TeamViewer Germany GmbHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1133External Remote Services

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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