Bypass of 2FA for Connections via Unattended Access in TeamViewer for macOS
Priority LOW 37CWE-288Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-288.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00397 34th percentileScored 2026-11-07
Fix Fixed Remote (TeamViewer): 15.80Tensor (TeamViewer): 15.80+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| TeamViewer | Remote | 15.00 to before 15.80 | 15.80 | Patch available | CNA |
| TeamViewer | Tensor | 15.00 to before 15.80 | 15.80 | Patch available | CNA |
| TeamViewer | ONE | 15.00 to before 15.80 | 15.80 | Patch available | CNA |
- Remote VendorTeamViewer Affected 15.00 to before 15.80 Fixed in 15.80 Patch available CNA
- Tensor VendorTeamViewer Affected 15.00 to before 15.80 Fixed in 15.80 Patch available CNA
- ONE VendorTeamViewer Affected 15.00 to before 15.80 Fixed in 15.80 Patch available CNA
Remediation
- Fix · CNA Remote (TeamViewer) Fixed in 15.80
- Fix · CNA Tensor (TeamViewer) Fixed in 15.80
- Fix · CNA ONE (TeamViewer) Fixed in 15.80
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12703
- 2026-10-03 Alias added: GHSA-r926-cxpx-jff4
References
More TeamViewer vulnerabilities
- TI-2019-13681 TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control… KEVCVSS 3.1HIGH 7.0
- TI-2020-10745 TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI… CVSS 3.1HIGH 8.8
- TI-2010-02989 Untrusted search path vulnerability in TeamViewer 5.0.8703 and earlier allows local… CVSS 2.0HIGH 9.3
- TI-2021-13849 Memory corruption in TeamViewer CVSS 3.1HIGH 8.8
- TI-2018-11870 TeamViewer 10.x through 13.x allows remote attackers to bypass the brute-force… CVSS 3.0CRITICAL 9.8
- TI-2025-28565 File Hash Validation Bypass in NomadBranch.exe CVSS 3.1HIGH 8.8
Sources
- CVE-2026-12703 · CVE Program
- CVE-2026-12703 · NVD
- FIRST EPSS
- GHSA-r926-cxpx-jff4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences