CVE-2026-108429
Full vulnerability record from the local CVENow database.
Description
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-10-15 21:17:08.190000
Last modified
2026-10-20 12:35:34.387000
View original CVE JSON
{
"id": "CVE-2026-108429",
"sourceIdentifier": "[email protected]",
"published": "2026-10-15T21:17:08.190",
"lastModified": "2026-10-20T12:35:34.387",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Microsoft",
"product": "Microsoft 365 Apps for Enterprise",
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"versions": [
{
"version": "16.0.1",
"lessThan": "https://aka.ms/OfficeSecurityReleases",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Office LTSC 2021",
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"versions": [
{
"version": "16.0.1",
"lessThan": "16.0.14334.20974",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Office LTSC 2024",
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"versions": [
{
"version": "16.0.0",
"lessThan": "16.0.17932.21056",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T00:00:00+00:00",
"id": "CVE-2026-108429",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-122"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*",
"matchCriteriaId": "3259EBFE-AE2D-48B8-BE9A-E22BBDB31378"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*",
"matchCriteriaId": "CD25F492-9272-4836-832C-8439EBE64CCF"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*",
"matchCriteriaId": "1D518075-3362-4D15-93B1-0E6C61518D16"
},
{
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"criteria": "cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*",
"matchCriteriaId": "1059BEC6-C30B-4F0F-A878-5267A21CBD85"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*",
"matchCriteriaId": "55A9AFDA-D77B-4CC7-ACE5-3A2ABDA257D8"
},
{
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"criteria": "cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*",
"matchCriteriaId": "8887D177-26A3-4008-89B6-50A9E9830F13"
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}
],
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108429",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}