FKIE_CVE-2026-45469
Vulnerability from fkie_nvd - Published: 2026-06-09 17:17 - Updated: 2026-06-11 18:37
Severity
Summary
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
References
| URL | Tags | ||
|---|---|---|---|
| secure@microsoft.com | https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45469 | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| microsoft | 365_apps | - | |
| microsoft | 365_apps | - | |
| microsoft | excel | 2016 | |
| microsoft | excel | 2016 | |
| microsoft | microsoft_365 | - | |
| microsoft | office_2019 | - | |
| microsoft | office_2019 | - | |
| microsoft | office_2021 | - | |
| microsoft | office_2021 | - | |
| microsoft | office_2021 | - | |
| microsoft | office_2024 | - | |
| microsoft | office_2024 | - | |
| microsoft | office_2024 | - | |
| microsoft | office_online_server | - |
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*",
"matchCriteriaId": "3259EBFE-AE2D-48B8-BE9A-E22BBDB31378",
"vulnerable": true
},
{
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"matchCriteriaId": "CD25F492-9272-4836-832C-8439EBE64CCF",
"vulnerable": true
},
{
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"vulnerable": true
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"vulnerable": true
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"vulnerable": true
},
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"negate": false,
"operator": "OR"
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally."
}
],
"id": "CVE-2026-45469",
"lastModified": "2026-06-11T18:37:56.337",
"metrics": {
"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": "Primary"
}
]
},
"published": "2026-06-09T17:17:21.460",
"references": [
{
"source": "secure@microsoft.com",
"tags": [
"Vendor Advisory"
],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45469"
}
],
"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-122"
},
{
"lang": "en",
"value": "CWE-191"
}
],
"source": "secure@microsoft.com",
"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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