Exploitation evidence
Known exploited · CISA KEV listed
Added 2021-11-03. Ransomware campaign use: Unknown.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-05-03. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Microsoft / Windows 10 Version 1803
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1809
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server 2019
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server 2019 (Server Core installation)
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1909
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server, version 1909 (Server Core installation)
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1709 for 32-bit Systems
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1709
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1903 for 32-bit Systems
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1903 for x64-based Systems
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1903 for ARM64-based Systems
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server, version 1903 (Server Core installation)
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 2004
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server version 2004
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1507
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 10 Version 1607
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server 2016
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows Server 2016 (Server Core installation)
Default status: Not specified
- affected: 10.0.0 to < publication (custom)
Microsoft / Windows 7
Default status: Not specified
- affected: 6.1.0 to < publication (custom)
Microsoft / Windows 7 Service Pack 1
Default status: Not specified
- affected: 6.1.0 to < publication (custom)
Microsoft / Windows 8.1
Default status: Not specified
- affected: 6.3.0 to < publication (custom)
Microsoft / Windows Server 2008 Service Pack 2
Default status: Not specified
- affected: 6.0.0 to < publication (custom)
Microsoft / Windows Server 2008 Service Pack 2 (Server Core installation)
Default status: Not specified
- affected: 6.0.0 to < publication (custom)
Microsoft / Windows Server 2008 Service Pack 2
Default status: Not specified
- affected: 6.0.0 to < publication (custom)
Microsoft / Windows Server 2008 R2 Service Pack 1
Default status: Not specified
- affected: 6.1.0 to < publication (custom)
Microsoft / Windows Server 2008 R2 Service Pack 1 (Server Core installation)
Default status: Not specified
- affected: 6.0.0 to < publication (custom)
Microsoft / Windows Server 2012
Default status: Not specified
- affected: 6.2.0 to < publication (custom)
Microsoft / Windows Server 2012 (Server Core installation)
Default status: Not specified
- affected: 6.2.0 to < publication (custom)
Microsoft / Windows Server 2012 R2
Default status: Not specified
- affected: 6.3.0 to < publication (custom)
Microsoft / Windows Server 2012 R2 (Server Core installation)
Default status: Not specified
- affected: 6.3.0 to < publication (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd
- https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464
- https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1464
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.38946,
"percentile": 0.98611
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.38946,
"percentile": 0.98602
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.38946,
"percentile": 0.986
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.38946,
"percentile": 0.98599
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.38946,
"percentile": 0.98599
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.38946,
"percentile": 0.98598
}06 Nov 2026, 06:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
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"timestamp": "2025-02-04T18:42:38.870747Z",
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"product": "Windows Server 2016 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
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"product": "Windows 7",
"vendor": "Microsoft",
"versions": [
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"product": "Windows 7 Service Pack 1",
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},
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},
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],
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],
"product": "Windows Server 2012",
"vendor": "Microsoft",
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},
{
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],
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"vendor": "Microsoft",
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},
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"product": "Windows Server 2012 R2",
"vendor": "Microsoft",
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{
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]
},
{
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],
"platforms": [
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],
"product": "Windows Server 2012 R2 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
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"versionType": "custom"
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]
}
],
"datePublic": "2020-08-11T07:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files.\nIn an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded.\nThe update addresses the vulnerability by correcting how Windows validates file signatures."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Spoofing",
"lang": "en-US",
"type": "Impact"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-05-29T16:32:23.703Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html"
}
],
"title": "Windows Spoofing Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2020-1464",
"datePublished": "2020-08-17T19:13:03.000Z",
"dateReserved": "2019-11-04T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:37.819Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.38946,
"percentile": 0.98596
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.38946,
"percentile": 0.98595
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.38946,
"percentile": 0.98592
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.38946,
"percentile": 0.9859
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2020-1464",
"cwes": [
"CWE-347"
],
"dateAdded": "2021-11-03",
"dueDate": "2022-05-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-1464",
"product": "Windows",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Microsoft Windows contains a spoofing vulnerability when Windows incorrectly validates file signatures, allowing an attacker to bypass security features and load improperly signed files.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft Windows Spoofing Vulnerability"
}