CVE-2026-40419
Full vulnerability record from the local CVENow database.
Description
Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-05-12 18:17:20.070000
Last modified
2026-10-26 18:10:00.173000
View original CVE JSON
{
"id": "CVE-2026-40419",
"sourceIdentifier": "[email protected]",
"published": "2026-05-12T18:17:20.070",
"lastModified": "2026-10-26T18:10:00.173",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally."
},
{
"lang": "es",
"value": "Uso después de liberar en Microsoft Office permite a un atacante autorizado elevar privilegios localmente."
}
],
"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 2019",
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"versions": [
{
"version": "19.0.0",
"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": "https://aka.ms/OfficeSecurityReleases",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Office LTSC 2024",
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"versions": [
{
"version": "16.0.0",
"lessThan": "https://aka.ms/OfficeSecurityReleases",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-05-13T03:56:47.386295Z",
"id": "CVE-2026-40419",
"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-416"
}
]
}
],
"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:2019:*:*:*:*:*:x64:*",
"matchCriteriaId": "CF5DDD09-902E-4881-98D0-CB896333B4AA"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*",
"matchCriteriaId": "26A3B226-5D7C-4556-9350-5222DC8EFC2C"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*",
"matchCriteriaId": "851BAC4E-9965-4F40-9A6C-B73D9004F4C1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*",
"matchCriteriaId": "23B2FA23-76F4-4D83-A718-B8D04D7EA37B"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*",
"matchCriteriaId": "D31E509A-0B2E-4B41-88C4-0099E800AFE6"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*",
"matchCriteriaId": "017A7041-BEF1-4E4E-AC8A-EFC6AFEB01FE"
}
]
}
]
}
],
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40419",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}