FKIE_CVE-2021-28453
Vulnerability from fkie_nvd - Published: 2021-04-13 20:15 - Updated: 2026-06-17 03:46
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/
Summary
Microsoft Word Remote Code Execution Vulnerability
References
| URL | Tags | ||
|---|---|---|---|
| secure@microsoft.com | https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28453 | Patch, Vendor Advisory | |
| secure@microsoft.com | https://www.zerodayinitiative.com/advisories/ZDI-21-423/ | Third Party Advisory, VDB Entry | |
| af854a3a-2127-422b-91ae-364da2661108 | https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28453 | Patch, Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.zerodayinitiative.com/advisories/ZDI-21-423/ | Third Party Advisory, VDB Entry |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| microsoft | 365_apps | - | |
| microsoft | office | 2019 | |
| microsoft | office | 2019 | |
| microsoft | office_online_server | - | |
| microsoft | office_web_apps | 2010 | |
| microsoft | office_web_apps_server | 2013 | |
| microsoft | sharepoint_server | 2010 | |
| microsoft | sharepoint_server | 2013 | |
| microsoft | sharepoint_server | 2016 | |
| microsoft | sharepoint_server | 2019 | |
| microsoft | word | 2010 | |
| microsoft | word | 2013 | |
| microsoft | word | 2013 | |
| microsoft | word | 2016 |
{
"affected": [
{
"affectedData": [
{
"cpes": [
"cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*"
],
"platforms": [
"x64-based Systems"
],
"product": "Microsoft SharePoint Enterprise Server 2016",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:enterprise:*:*:*"
],
"platforms": [
"x64-based Systems"
],
"product": "Microsoft SharePoint Enterprise Server 2013 Service Pack 1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*"
],
"platforms": [
"x64-based Systems"
],
"product": "Microsoft SharePoint Server 2019",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*"
],
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Microsoft Office 2019",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "https://aka.ms/OfficeSecurityReleases",
"status": "affected",
"version": "19.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Office 2019 for Mac",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Office Online Server",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*"
],
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Microsoft 365 Apps for Enterprise",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "https://aka.ms/OfficeSecurityReleases",
"status": "affected",
"version": "16.0.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*"
],
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Microsoft Word 2016",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:*:*"
],
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Microsoft Office 2010 Service Pack 2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "13.0.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:office_web_apps:2010:sp2:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Office Web Apps 2010 Service Pack 2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "13.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:office_web_apps_server:2013:sp1:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Office Web Apps Server 2013 Service Pack 1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.0.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:sharepoint_server:2010:sp2:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft SharePoint Server 2010 Service Pack 2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "13.0.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*"
],
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Microsoft Word 2010 Service Pack 2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "13.0.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:word:2013:sp1:*:*:*:*:*:*"
],
"platforms": [
"ARM64-based Systems",
"32-bit Systems"
],
"product": "Microsoft Word 2013 Service Pack 1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.0.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:word:2013:sp1:*:*:*:*:*:*"
],
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Word 2013 Service Pack 1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.0.1",
"versionType": "custom"
}
]
}
],
"source": "secure@microsoft.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*",
"matchCriteriaId": "40C15EDD-98D4-4D06-BA06-21AE0F33C72D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:*",
"matchCriteriaId": "C5282C83-86B8-442D-851D-B54E88E8B1F1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*",
"matchCriteriaId": "40961B9E-80B6-42E0-A876-58B3CE056E4E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*",
"matchCriteriaId": "E98AE986-FA31-4301-8025-E8915BA4AC5E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_web_apps:2010:sp2:*:*:*:*:*:*",
"matchCriteriaId": "A8235774-4B57-4793-BE26-2CDE67532EDD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_web_apps_server:2013:sp1:*:*:*:*:*:*",
"matchCriteriaId": "941B16A2-931D-4031-A016-5EA60E87BE20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:sharepoint_server:2010:sp2:*:*:*:*:*:*",
"matchCriteriaId": "9A57C675-05A9-4BC2-AE95-7CA5CA6B1F73",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:*:*:*:*",
"matchCriteriaId": "16F33176-442C-4EFF-8EA0-C640D203B939",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*",
"matchCriteriaId": "F815EF1D-7B60-47BE-9AC2-2548F99F10E4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*",
"matchCriteriaId": "6122D014-5BF1-4AF4-8B4D-80205ED7785E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*",
"matchCriteriaId": "24EEDAD9-9656-4B21-82E4-D60B83777492",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:word:2013:sp1:*:*:-:*:*:*",
"matchCriteriaId": "D7A48E44-F01A-40AD-B8AF-8FE368248003",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:word:2013:sp1:*:*:rt:*:*:*",
"matchCriteriaId": "45E21528-4B0F-4A6F-82AD-DF7FDBF67C8F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*",
"matchCriteriaId": "4DA042D4-B14E-4DDF-8423-DFB255679EFE",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Microsoft Word Remote Code Execution Vulnerability"
},
{
"lang": "es",
"value": "Una vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de Microsoft Word"
}
],
"id": "CVE-2021-28453",
"lastModified": "2026-06-17T03:46:23.283",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"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": "secure@microsoft.com",
"type": "Secondary"
},
{
"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": "Secondary"
}
]
},
"published": "2021-04-13T20:15:20.343",
"references": [
{
"source": "secure@microsoft.com",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28453"
},
{
"source": "secure@microsoft.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-423/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28453"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-423/"
}
],
"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"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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