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

Vulnerability from cvelistv5 – Published: 2026-07-29 14:13 – Updated: 2026-07-29 15:07
VLAI
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 (v2.0.3)
CWE
  • CWE-288 - Authentication bypass using an alternate path or channel
Assigner
TV
References
Impacted products
Vendor Product Version
TeamViewer Remote Affected: 15.00 , < 15.80 (custom)
Create a notification for this product.
TeamViewer Tensor Affected: 15.00 , < 15.80 (custom)
Create a notification for this product.
TeamViewer ONE Affected: 15.00 , < 15.80 (custom)
Create a notification for this product.
Credits
We thank dameb for the discovery and responsible disclosure
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-12703",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-29T15:07:03.248622Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-29T15:07:08.712Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Full Client",
            "Host"
          ],
          "platforms": [
            "MacOS"
          ],
          "product": "Remote",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "15.80",
              "status": "affected",
              "version": "15.00",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Full Client",
            "Host"
          ],
          "platforms": [
            "MacOS"
          ],
          "product": "Tensor",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "15.80",
              "status": "affected",
              "version": "15.00",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Full Client",
            "Host"
          ],
          "platforms": [
            "MacOS"
          ],
          "product": "ONE",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "15.80",
              "status": "affected",
              "version": "15.00",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "We thank dameb for the discovery and responsible disclosure"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "TeamViewer Full Client and Host\u0026nbsp;for macOS before version 15.80\u0026nbsp;contain\u0026nbsp;a business logic error that can allow an authenticated attacker to bypass\u0026nbsp;a\u0026nbsp;configured 2FA\u0026nbsp;for\u0026nbsp;Connections approval flow\u0026nbsp;via\u0026nbsp;Unattended\u0026nbsp;Access\u0026nbsp;and\u0026nbsp;establish\u0026nbsp;a remote connection to an affected macOS host.\u0026nbsp;"
            }
          ],
          "value": "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-115",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-115 Authentication Bypass"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-288",
              "description": "CWE-288 Authentication bypass using an alternate path or channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-29T14:13:19.692Z",
        "orgId": "13430f76-86eb-43b2-a71c-82c956ef31b6",
        "shortName": "TV"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1007/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Update to the latest version (15.80 or the latest version available)"
            }
          ],
          "value": "Update to the latest version (15.80 or the latest version available)"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Bypass of 2FA for Connections via Unattended Access in TeamViewer for macOS",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "13430f76-86eb-43b2-a71c-82c956ef31b6",
    "assignerShortName": "TV",
    "cveId": "CVE-2026-12703",
    "datePublished": "2026-07-29T14:13:19.692Z",
    "dateReserved": "2026-06-19T10:17:46.376Z",
    "dateUpdated": "2026-07-29T15:07:08.712Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-12703\",\"sourceIdentifier\":\"psirt@teamviewer.com\",\"published\":\"2026-07-29T15:16:20.183\",\"lastModified\":\"2026-07-29T16:17:49.380\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"psirt@teamviewer.com\",\"affectedData\":[{\"vendor\":\"TeamViewer\",\"product\":\"Remote\",\"defaultStatus\":\"unaffected\",\"modules\":[\"Full Client\",\"Host\"],\"platforms\":[\"MacOS\"],\"versions\":[{\"version\":\"15.00\",\"lessThan\":\"15.80\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"TeamViewer\",\"product\":\"Tensor\",\"defaultStatus\":\"unaffected\",\"modules\":[\"Full Client\",\"Host\"],\"platforms\":[\"MacOS\"],\"versions\":[{\"version\":\"15.00\",\"lessThan\":\"15.80\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"TeamViewer\",\"product\":\"ONE\",\"defaultStatus\":\"unaffected\",\"modules\":[\"Full Client\",\"Host\"],\"platforms\":[\"MacOS\"],\"versions\":[{\"version\":\"15.00\",\"lessThan\":\"15.80\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@teamviewer.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":8.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.3,\"impactScore\":6.0}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-29T15:07:03.248622Z\",\"id\":\"CVE-2026-12703\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"psirt@teamviewer.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-288\"}]}],\"references\":[{\"url\":\"https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1007/\",\"source\":\"psirt@teamviewer.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-12703\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-29T15:07:03.248622Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-29T15:07:05.457Z\"}}], \"cna\": {\"title\": \"Bypass of 2FA for Connections via Unattended Access in TeamViewer for macOS\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"We thank dameb for the discovery and responsible disclosure\"}], \"impacts\": [{\"capecId\": \"CAPEC-115\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-115 Authentication Bypass\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"TeamViewer\", \"modules\": [\"Full Client\", \"Host\"], \"product\": \"Remote\", \"versions\": [{\"status\": \"affected\", \"version\": \"15.00\", \"lessThan\": \"15.80\", \"versionType\": \"custom\"}], \"platforms\": [\"MacOS\"], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"TeamViewer\", \"modules\": [\"Full Client\", \"Host\"], \"product\": \"Tensor\", \"versions\": [{\"status\": \"affected\", \"version\": \"15.00\", \"lessThan\": \"15.80\", \"versionType\": \"custom\"}], \"platforms\": [\"MacOS\"], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"TeamViewer\", \"modules\": [\"Full Client\", \"Host\"], \"product\": \"ONE\", \"versions\": [{\"status\": \"affected\", \"version\": \"15.00\", \"lessThan\": \"15.80\", \"versionType\": \"custom\"}], \"platforms\": [\"MacOS\"], \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Update to the latest version (15.80 or the latest version available)\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Update to the latest version (15.80 or the latest version available)\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1007/\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"TeamViewer Full Client and Host\u0026nbsp;for macOS before version 15.80\u0026nbsp;contain\u0026nbsp;a business logic error that can allow an authenticated attacker to bypass\u0026nbsp;a\u0026nbsp;configured 2FA\u0026nbsp;for\u0026nbsp;Connections approval flow\u0026nbsp;via\u0026nbsp;Unattended\u0026nbsp;Access\u0026nbsp;and\u0026nbsp;establish\u0026nbsp;a remote connection to an affected macOS host.\u0026nbsp;\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-288\", \"description\": \"CWE-288 Authentication bypass using an alternate path or channel\"}]}], \"providerMetadata\": {\"orgId\": \"13430f76-86eb-43b2-a71c-82c956ef31b6\", \"shortName\": \"TV\", \"dateUpdated\": \"2026-07-29T14:13:19.692Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-12703\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-29T15:07:08.712Z\", \"dateReserved\": \"2026-06-19T10:17:46.376Z\", \"assignerOrgId\": \"13430f76-86eb-43b2-a71c-82c956ef31b6\", \"datePublished\": \"2026-07-29T14:13:19.692Z\", \"assignerShortName\": \"TV\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.