FKIE_CVE-2021-34803
Vulnerability from fkie_nvd - Published: 2021-06-16 15:15 - Updated: 2026-06-17 03:56
Severity
Summary
TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| teamviewer | teamviewer | * | |
| teamviewer | teamviewer | * | |
| teamviewer | teamviewer | * | |
| teamviewer | teamviewer | * | |
| teamviewer | teamviewer | * | |
| teamviewer | teamviewer | * | |
| teamviewer | teamviewer | * | |
| microsoft | windows | - |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A6AF9CEE-E8EC-4849-B983-8A68034DFA69",
"versionEndExcluding": "9.0.259145",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*",
"matchCriteriaId": "5FE92BC5-5413-4161-8853-DC99B65AED90",
"versionEndExcluding": "10.0.259144",
"versionStartIncluding": "10.0.2551",
"vulnerable": true
},
{
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"versionEndExcluding": "11.0.259143",
"versionStartIncluding": "11.0.90968",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*",
"matchCriteriaId": "FE8628AD-DBC1-47C6-AA4E-67DB79489A03",
"versionEndExcluding": "12.0.259142",
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"vulnerable": true
},
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"versionEndExcluding": "13.2.36222",
"versionStartIncluding": "13.0.5058",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9E7801E9-1B99-4A38-89D3-7C581D6DB491",
"versionEndExcluding": "14.2.56678",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0C3ED13C-EF4E-4710-8630-D3CE40FB0004",
"versionEndExcluding": "14.7.48644",
"versionStartIncluding": "14.3.4730",
"vulnerable": true
}
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"operator": "OR"
},
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"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations."
},
{
"lang": "es",
"value": "TeamViewer versiones anteriores a 14.7.48644 en Windows carga DLLs no confiables en determinadas situaciones"
}
],
"id": "CVE-2021-34803",
"lastModified": "2026-06-17T03:56:36.110",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.4,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.4,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-06-16T15:15:08.570",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111147/windows-v9-0-259145"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111149/windows-v10-0-259144"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111150/windows-v11-0-259143"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111151/windows-v12-0-259142"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111152/windows-v13-2-36222"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111153/windows-v14-2-56678"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111154/windows-v14-7-48644"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111147/windows-v9-0-259145"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111149/windows-v10-0-259144"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111150/windows-v11-0-259143"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111151/windows-v12-0-259142"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111152/windows-v13-2-36222"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111153/windows-v14-2-56678"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://community.teamviewer.com/English/discussion/111154/windows-v14-7-48644"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-427"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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.
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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.
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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.
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