What is CVE-2026-12703?

CVE-2026-12703 is a high-severity vulnerability in Teamviewer One, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.0/10. Published 2026-07-29.

How severe is CVE-2026-12703?

High severity. CVSS v3 base score is 8.0 out of 10.

Vulnerability in Teamviewer One

CVE-2026-12703

TeamViewer Full Client and Host for macOS before version 15.80 contain a business logic error that can allow an authenticated attacker to bypass a configured 2FA for Connections approval flow via Unattended Access and establish a remote co…

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Teamviewer One — versions 15.00
Teamviewer Remote — versions 15.00
Teamviewer Tensor — versions 15.00

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

psirt@teamviewer.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-12703?: CVE-2026-12703 is a high-severity vulnerability in Teamviewer One, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.0/10. Published 2026-07-29.
How severe is CVE-2026-12703?: High severity. CVSS v3 base score is 8.0 out of 10.