CVE-2026-12703 (GCVE-0-2026-12703)
Vulnerability from cvelistv5 – Published: 2026-07-29 14:13 – Updated: 2026-07-29 15:07
VLAI
EPSS
VEX
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
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 |
{
"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": {
"epss": {
"cve": "CVE-2026-12703",
"date": "2026-09-22",
"epss": "0.00234",
"percentile": "0.1464"
},
"nvd": {
"cve": {
"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"
}
]
},
{
"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"
}
]
}
],
"source": "psirt@teamviewer.com"
}
],
"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."
}
],
"id": "CVE-2026-12703",
"lastModified": "2026-07-30T16:45:00.353",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.0,
"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"
},
"exploitabilityScore": 1.3,
"impactScore": 6.0,
"source": "psirt@teamviewer.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-12703",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-29T15:07:03.248622Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-29T15:16:20.183",
"references": [
{
"source": "psirt@teamviewer.com",
"url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1007/"
}
],
"sourceIdentifier": "psirt@teamviewer.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-288"
}
],
"source": "psirt@teamviewer.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"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": "2026-07-29T15:07:05.457Z",
"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"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Loading…
Loading…
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.
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.
Loading…
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.
Loading…