Vulnerability-Lookup

CVE-2026-12703 (GCVE-0-2026-12703)

Vulnerability from cvelistv5 – Published: 2026-07-29 14:13 – Updated: 2026-07-29 15:07

Title

Bypass of 2FA for Connections via Unattended Access in TeamViewer for macOS

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.

Severity

8 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-29 15:07 UTC

CWE

CWE-288 - Authentication bypass using an alternate path or channel

Assigner

References

1 reference

URL	Tags
https://www.teamviewer.com/en/resources/trust-cen…	vendor-advisory

Impacted products

3 products

Vendor	Product	Version	CPE status
TeamViewer	Remote	Affected: 15.00 , < 15.80 (custom)	guessed
TeamViewer	Tensor	Affected: 15.00 , < 15.80 (custom)	guessed
TeamViewer	ONE	Affected: 15.00 , < 15.80 (custom)	guessed

Credits

We thank dameb for the discovery and responsible disclosure

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-12703

Vulnerability from fkie_nvd - Published: 2026-07-29 15:16 - Updated: 2026-07-30 16:45

Severity

8.0 (High) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Full Client",
            "Host"
          ],
          "platforms": [
            "MacOS"
          ],
          "product": "Remote",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "15.80",
              "status": "affected",
              "version": "15.00",
              "versionType": "custom"
            }
          ]
        },
        {
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          ],
          "product": "Tensor",
          "vendor": "TeamViewer",
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        {
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              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "psirt@teamviewer.com"
    }
  ],
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    }
  ],
  "id": "CVE-2026-12703",
  "lastModified": "2026-07-30T16:45:00.353",
  "metrics": {
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GHSA-R926-CXPX-JFF4

Vulnerability from github – Published: 2026-07-29 15:31 – Updated: 2026-07-29 15:31

Details

Severity

8.0 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-12703"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-288"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-29T15:16:20Z",
    "severity": "HIGH"
  },
  "details": "TeamViewer Full Client and Host\u00a0for macOS before version 15.80\u00a0contain\u00a0a business logic error that can allow an authenticated attacker to bypass\u00a0a\u00a0configured 2FA\u00a0for\u00a0Connections approval flow\u00a0via\u00a0Unattended\u00a0Access\u00a0and\u00a0establish\u00a0a remote connection to an affected macOS host.",
  "id": "GHSA-r926-cxpx-jff4",
  "modified": "2026-07-29T15:31:12Z",
  "published": "2026-07-29T15:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12703"
    },
    {
      "type": "WEB",
      "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1007"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-12703 (GCVE-0-2026-12703)

FKIE_CVE-2026-12703

GHSA-R926-CXPX-JFF4

Tags

Sightings

Nomenclature

Related by attack behaviour