CVE-2019-1091
Status: ModifiedMedium (5.5)—
An information disclosure vulnerability exists when Unistore.dll fails to properly handle objects in memory, aka 'Microsoft unistore.dll Information Disclosure Vulnerability'.
CVSS
- Version: 3.0
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Base score: 5.5
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 1.99%
- Percentile among all scored CVEs: 80
- Score date: 10/18/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (3)
CWEs
- CWE-200
References
Raw JSON (NVD)
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{
"id": "CVE-2019-1091",
"cveTags": [],
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"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
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"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
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"impactScore": 3.6,
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"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"vendor": "Microsoft",
"product": "Windows",
"versions": [
{
"status": "affected",
"version": "10 for 32-bit Systems"
},
{
"status": "affected",
"version": "10 for x64-based Systems"
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{
"status": "affected",
"version": "10 Version 1607 for 32-bit Systems"
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{
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"version": "10 Version 1607 for x64-based Systems"
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{
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{
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{
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{
"vendor": "Microsoft",
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"versions": [
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"status": "affected",
"version": "2016"
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{
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"version": "2016 (Core installation)"
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{
"status": "affected",
"version": "version 1803 (Core Installation)"
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{
"status": "affected",
"version": "2019"
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{
"status": "affected",
"version": "2019 (Core installation)"
}
]
},
{
"vendor": "Microsoft",
"product": "Windows 10 Version 1903 for 32-bit Systems",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
},
{
"vendor": "Microsoft",
"product": "Windows 10 Version 1903 for x64-based Systems",
"versions": [
{
"status": "affected",
"version": "unspecified"
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},
{
"vendor": "Microsoft",
"product": "Windows 10 Version 1903 for ARM64-based Systems",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
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},
{
"vendor": "Microsoft",
"product": "Windows Server, version 1903 (Server Core installation)",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
}
]
}
],
"published": "2019-07-15T19:15:18.497",
"references": [
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1091",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1091",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-200"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An information disclosure vulnerability exists when Unistore.dll fails to properly handle objects in memory, aka 'Microsoft unistore.dll Information Disclosure Vulnerability'."
},
{
"lang": "es",
"value": "Existe una vulnerabilidad de divulgación de información cuando Unistore.dll no puede manejar correctamente los objetos en la memoria, también se conoce como 'Microsoft unistore.dll Information Disclosure Vulnerability'."
}
],
"lastModified": "2026-06-17T02:27:48.473",
"configurations": [
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"sourceIdentifier": "secure@microsoft.com"
}