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CERTFR-2026-AVI-0584
Vulnerability from certfr_avis - Published: 2026-05-13 - Updated: 2026-05-13
De multiples vulnérabilités ont été découvertes dans Microsoft Office. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Microsoft | N/A | Microsoft Excel 2016 (édition 64 bits) versions antérieures à 16.0.5552.1000 | ||
| Microsoft | N/A | Microsoft Excel pour Android versions antérieures à 16.0.19822.20190 | ||
| Microsoft | N/A | Microsoft Outlook pour iOS versions antérieures à 5.2617.1 | ||
| Microsoft | N/A | Microsoft Word 2016 (édition 32 bits) versions antérieures à 16.0.5552.1000 | ||
| Microsoft | N/A | Microsoft Office pour Android versions antérieures à 16.0.19822.20190 | ||
| Microsoft | N/A | Microsoft Office LTSC pour Mac 2024 versions antérieures à 16.109.26051019 | ||
| Microsoft | N/A | Microsoft Office LTSC 2024 pour éditions 64 bits | ||
| Microsoft | N/A | Office Online Server versions antérieures à 16.0.10417.20128 | ||
| Microsoft | N/A | Microsoft Office LTSC 2021 pour éditions 32 bits | ||
| Microsoft | N/A | Microsoft Office 2016 (édition 32 bits) versions antérieures à 16.0.5552.1000 | ||
| Microsoft | N/A | Microsoft Office 2019 pour éditions 32 bits | ||
| Microsoft | N/A | Microsoft 365 Apps pour Enterprise pour systèmes 32 bits | ||
| Microsoft | N/A | Microsoft Office 2019 pour éditions 64 bits | ||
| Microsoft | N/A | Microsoft Excel 2016 (édition 32 bits) versions antérieures à 16.0.5552.1000 | ||
| Microsoft | N/A | Microsoft Office LTSC 2024 pour éditions 32 bits | ||
| Microsoft | N/A | Microsoft 365 Copilot pour Android versions antérieures à 16.0.19822.20190 | ||
| Microsoft | N/A | Microsoft PowerPoint pour Android versions antérieures à 16.0.19822.20190 | ||
| Microsoft | N/A | Microsoft Word 2016 (édition 64 bits) versions antérieures à 16.0.5552.1000 | ||
| Microsoft | N/A | Microsoft Office LTSC 2021 pour éditions 64 bits | ||
| Microsoft | N/A | Microsoft Office LTSC pour Mac 2021 versions antérieures à 16.109.26051019 | ||
| Microsoft | N/A | Microsoft 365 Apps pour Enterprise pour systèmes 64 bits | ||
| Microsoft | N/A | Microsoft Office 2016 (édition 64 bits) versions antérieures à 16.0.5552.1000 | ||
| Microsoft | N/A | Microsoft Word pour Android versions antérieures à 16.0.19822.20190 |
References
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Microsoft Excel 2016 (\u00e9dition 64 bits) versions ant\u00e9rieures \u00e0 16.0.5552.1000",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Excel pour Android versions ant\u00e9rieures \u00e0 16.0.19822.20190",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Outlook pour iOS versions ant\u00e9rieures \u00e0 5.2617.1",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Word 2016 (\u00e9dition 32 bits) versions ant\u00e9rieures \u00e0 16.0.5552.1000",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office pour Android versions ant\u00e9rieures \u00e0 16.0.19822.20190",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office LTSC pour Mac 2024 versions ant\u00e9rieures \u00e0 16.109.26051019",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office LTSC 2024 pour \u00e9ditions 64 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Office Online Server versions ant\u00e9rieures \u00e0 16.0.10417.20128",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office LTSC 2021 pour \u00e9ditions 32 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office 2016 (\u00e9dition 32 bits) versions ant\u00e9rieures \u00e0 16.0.5552.1000",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office 2019 pour \u00e9ditions 32 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft 365 Apps pour Enterprise pour syst\u00e8mes 32 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office 2019 pour \u00e9ditions 64 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Excel 2016 (\u00e9dition 32 bits) versions ant\u00e9rieures \u00e0 16.0.5552.1000",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office LTSC 2024 pour \u00e9ditions 32 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft 365 Copilot pour Android versions ant\u00e9rieures \u00e0 16.0.19822.20190",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft PowerPoint pour Android versions ant\u00e9rieures \u00e0 16.0.19822.20190",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Word 2016 (\u00e9dition 64 bits) versions ant\u00e9rieures \u00e0 16.0.5552.1000",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office LTSC 2021 pour \u00e9ditions 64 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office LTSC pour Mac 2021 versions ant\u00e9rieures \u00e0 16.109.26051019",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft 365 Apps pour Enterprise pour syst\u00e8mes 64 bits",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Office 2016 (\u00e9dition 64 bits) versions ant\u00e9rieures \u00e0 16.0.5552.1000",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft Word pour Android versions ant\u00e9rieures \u00e0 16.0.19822.20190",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-41102",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-41102"
},
{
"name": "CVE-2026-40419",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40419"
},
{
"name": "CVE-2026-40421",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40421"
},
{
"name": "CVE-2026-41100",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-41100"
},
{
"name": "CVE-2026-42893",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42893"
},
{
"name": "CVE-2026-40418",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40418"
},
{
"name": "CVE-2026-40359",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40359"
},
{
"name": "CVE-2026-40364",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40364"
},
{
"name": "CVE-2026-40360",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40360"
},
{
"name": "CVE-2026-40362",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40362"
},
{
"name": "CVE-2026-35440",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-35440"
},
{
"name": "CVE-2026-40367",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40367"
},
{
"name": "CVE-2026-40420",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40420"
},
{
"name": "CVE-2026-40363",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40363"
},
{
"name": "CVE-2026-40361",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40361"
},
{
"name": "CVE-2026-41101",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-41101"
},
{
"name": "CVE-2026-42832",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42832"
},
{
"name": "CVE-2026-35436",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-35436"
},
{
"name": "CVE-2026-40366",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40366"
},
{
"name": "CVE-2026-40358",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40358"
},
{
"name": "CVE-2026-42831",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42831"
}
],
"initial_release_date": "2026-05-13T00:00:00",
"last_revision_date": "2026-05-13T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0584",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-05-13T00:00:00.000000"
}
],
"risks": [
{
"description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
},
{
"description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Microsoft Office. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance, une \u00e9l\u00e9vation de privil\u00e8ges et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Microsoft Office",
"vendor_advisories": [
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40418",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40418"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-35440",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35440"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40363",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40363"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40421",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40421"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40367",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40367"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-41100",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41100"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40366",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40366"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-35436",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35436"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40361",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40361"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40364",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40364"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-42832",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42832"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40359",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40359"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40419",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40419"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40358",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40358"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-42893",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40360",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40360"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40420",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40420"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-41101",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41101"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-40362",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40362"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-42831",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42831"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-41102",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41102"
}
]
}
CVE-2026-42831 (GCVE-0-2026-42831)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Remote Code Execution Vulnerability
Summary
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Office for Android |
Affected:
16.0.1 , < 16.0.19822.20190
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
Date Public ?
2026-05-12 14:00
{
"containers": {
"adp": [
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"metrics": [
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"content": {
"id": "CVE-2026-42831",
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-13T03:56:52.720107Z",
"version": "2.0.3"
},
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"title": "CISA ADP Vulnrichment"
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"product": "Microsoft Office for Android",
"vendor": "Microsoft",
"versions": [
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"descriptions": [
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"metrics": [
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
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CVE-2026-40418 (GCVE-0-2026-40418)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Summary
Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-41101 (GCVE-0-2026-41101)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word for Android Spoofing Vulnerability
Summary
Improper access control in Microsoft Office Word allows an authorized attacker to perform spoofing locally.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Word for Android |
Affected:
16.0.0.0 , < 16.0.19822.20190
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40364 (GCVE-0-2026-40364)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word Remote Code Execution Vulnerability
Summary
Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity ?
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5552.1000
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-35436 (GCVE-0-2026-35436)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Summary
Insufficient granularity of access control in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Severity ?
CWE
- CWE-1220 - Insufficient Granularity of Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-35440 (GCVE-0-2026-35440)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word Information Disclosure Vulnerability
Summary
Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Severity ?
CWE
- CWE-552 - Files or Directories Accessible to External Parties
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5552.1000
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40421 (GCVE-0-2026-40421)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word Information Disclosure Vulnerability
Summary
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Severity ?
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5552.1000
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40361 (GCVE-0-2026-40361)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5552.1000
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40362 (GCVE-0-2026-40362)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5552.1000
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20128
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-41102 (GCVE-0-2026-41102)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft PowerPoint for Android Spoofing Vulnerability
Summary
Improper access control in Microsoft Office PowerPoint allows an authorized attacker to perform spoofing locally.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft PowerPoint for Android |
Affected:
16.0.0.0 , < 16.0.19822.20190
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40367 (GCVE-0-2026-40367)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word Remote Code Execution Vulnerability
Summary
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-822 - Untrusted Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |
Affected:
16.0.0 , < 16.0.5552.1002
(custom)
|
|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20128
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19725.20280
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5552.1000
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-42832 (GCVE-0-2026-42832)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Spoofing Vulnerability
Summary
Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Excel for Android |
Affected:
16.0.0.0 , < 16.0.19822.20190
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Word for Android |
Affected:
16.0.0.0 , < 16.0.19822.20190
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-41100 (GCVE-0-2026-41100)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft 365 Copilot for Android Spoofing Vulnerability
Summary
Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Copilot for Android |
Affected:
1.0 , < 16.0.19822.20190
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40419 (GCVE-0-2026-40419)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Summary
Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40358 (GCVE-0-2026-40358)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5552.1000
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-42893 (GCVE-0-2026-42893)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Outlook for iOS Tampering Vulnerability
Summary
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.
Severity ?
CWE
- CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Outlook for iOS |
Affected:
1.0.0 , < 5.2617.1
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40363 (GCVE-0-2026-40363)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Remote Code Execution Vulnerability
Summary
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5552.1000
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office for Android |
Affected:
16.0.1 , < 16.0.19822.20190
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40360 (GCVE-0-2026-40360)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Excel Information Disclosure Vulnerability
Summary
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5552.1000
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20128
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40359 (GCVE-0-2026-40359)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5552.1000
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20128
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40420 (GCVE-0-2026-40420)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Summary
Improper access control in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
Date Public ?
2026-05-12 14:00
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CVE-2026-40366 (GCVE-0-2026-40366)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-14 18:08
VLAI?
EPSS
Title
Microsoft Word Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.109.26051019
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5552.1000
(custom)
|
Date Public ?
2026-05-12 14:00
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"criteria": "cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*",
"versionEndExcluding": "https://aka.ms/OfficeSecurityReleases",
"versionStartIncluding": "16.0.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*",
"versionEndExcluding": "16.109.26051019",
"versionStartIncluding": "16.0.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*",
"versionEndExcluding": "https://aka.ms/OfficeSecurityReleases",
"versionStartIncluding": "16.0.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*",
"versionEndExcluding": "https://aka.ms/OfficeSecurityReleases",
"versionStartIncluding": "16.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*",
"versionEndExcluding": "16.109.26051019",
"versionStartIncluding": "16.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:word_2016:*:*:*:*:*:*:*:*",
"versionEndExcluding": "16.0.5552.1000",
"versionStartIncluding": "16.0.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"datePublic": "2026-05-12T14:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.4,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416: Use After Free",
"lang": "en-US",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-14T18:08:07.386Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"name": "Microsoft Word Remote Code Execution Vulnerability",
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40366"
}
],
"title": "Microsoft Word Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2026-40366",
"datePublished": "2026-05-12T16:58:38.928Z",
"dateReserved": "2026-04-11T23:06:15.614Z",
"dateUpdated": "2026-05-14T18:08:07.386Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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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