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
Default status: Not specified
- affected: 10 Version 1803 for 32-bit Systems
- affected: 10 Version 1803 for x64-based Systems
- affected: 10 Version 1803 for ARM64-based Systems
- affected: 10 Version 1809 for 32-bit Systems
- affected: 10 Version 1809 for x64-based Systems
- affected: 10 Version 1809 for ARM64-based Systems
- affected: 10 Version 1709 for 32-bit Systems
- affected: 10 Version 1709 for x64-based Systems
- affected: 10 Version 1709 for ARM64-based Systems
- affected: 10 for 32-bit Systems
- affected: 10 for x64-based Systems
- affected: 10 Version 1607 for 32-bit Systems
- affected: 10 Version 1607 for x64-based Systems
- affected: 7 for 32-bit Systems Service Pack 1
- affected: 7 for x64-based Systems Service Pack 1
- affected: 8.1 for 32-bit systems
- affected: 8.1 for x64-based systems
- affected: RT 8.1
Microsoft / Windows Server
Default status: Not specified
- affected: version 1803 (Core Installation)
- affected: 2019
- affected: 2019 (Core installation)
- affected: 2016
- affected: 2016 (Core installation)
- affected: 2008 for 32-bit Systems Service Pack 2
- affected: 2008 for 32-bit Systems Service Pack 2 (Core installation)
- affected: 2008 for Itanium-Based Systems Service Pack 2
- affected: 2008 for x64-based Systems Service Pack 2
- affected: 2008 for x64-based Systems Service Pack 2 (Core installation)
- affected: 2008 R2 for Itanium-Based Systems Service Pack 1
- affected: 2008 R2 for x64-based Systems Service Pack 1
- affected: 2008 R2 for x64-based Systems Service Pack 1 (Core installation)
- affected: 2012
- affected: 2012 (Core installation)
- affected: 2012 R2
- affected: 2012 R2 (Core installation)
Microsoft / Windows 10 Version 1909 for 32-bit Systems
Default status: Not specified
- affected: unspecified
Microsoft / Windows 10 Version 1909 for x64-based Systems
Default status: Not specified
- affected: unspecified
Microsoft / Windows 10 Version 1909 for ARM64-based Systems
Default status: Not specified
- affected: unspecified
Microsoft / Windows Server, version 1909 (Server Core installation)
Default status: Not specified
- affected: unspecified
Microsoft / Windows 10 Version 1903 for 32-bit Systems
Default status: Not specified
- affected: unspecified
Microsoft / Windows 10 Version 1903 for x64-based Systems
Default status: Not specified
- affected: unspecified
Microsoft / Windows 10 Version 1903 for ARM64-based Systems
Default status: Not specified
- affected: unspecified
Microsoft / Windows Server, version 1903 (Server Core installation)
Default status: Not specified
- affected: unspecified
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
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": 0.65037,
"percentile": 0.99263
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.65037,
"percentile": 0.99258
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.65037,
"percentile": 0.99257
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.65037,
"percentile": 0.99256
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.65037,
"percentile": 0.99256
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.65037,
"percentile": 0.99255
}06 Nov 2026, 06:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
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{
"status": "affected",
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{
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"version": "10 Version 1809 for 32-bit Systems"
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{
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{
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{
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{
"status": "affected",
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},
{
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"version": "RT 8.1"
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},
{
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"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "version 1803 (Core Installation)"
},
{
"status": "affected",
"version": "2019"
},
{
"status": "affected",
"version": "2019 (Core installation)"
},
{
"status": "affected",
"version": "2016"
},
{
"status": "affected",
"version": "2016 (Core installation)"
},
{
"status": "affected",
"version": "2008 for 32-bit Systems Service Pack 2"
},
{
"status": "affected",
"version": "2008 for 32-bit Systems Service Pack 2 (Core installation)"
},
{
"status": "affected",
"version": "2008 for Itanium-Based Systems Service Pack 2"
},
{
"status": "affected",
"version": "2008 for x64-based Systems Service Pack 2"
},
{
"status": "affected",
"version": "2008 for x64-based Systems Service Pack 2 (Core installation)"
},
{
"status": "affected",
"version": "2008 R2 for Itanium-Based Systems Service Pack 1"
},
{
"status": "affected",
"version": "2008 R2 for x64-based Systems Service Pack 1"
},
{
"status": "affected",
"version": "2008 R2 for x64-based Systems Service Pack 1 (Core installation)"
},
{
"status": "affected",
"version": "2012"
},
{
"status": "affected",
"version": "2012 (Core installation)"
},
{
"status": "affected",
"version": "2012 R2"
},
{
"status": "affected",
"version": "2012 R2 (Core installation)"
}
]
},
{
"product": "Windows 10 Version 1909 for 32-bit Systems",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
},
{
"product": "Windows 10 Version 1909 for x64-based Systems",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
},
{
"product": "Windows 10 Version 1909 for ARM64-based Systems",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "unspecified"
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]
},
{
"product": "Windows Server, version 1909 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
},
{
"product": "Windows 10 Version 1903 for 32-bit Systems",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
},
{
"product": "Windows 10 Version 1903 for x64-based Systems",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
"version": "unspecified"
}
]
},
{
"product": "Windows 10 Version 1903 for ARM64-based Systems",
"vendor": "Microsoft",
"versions": [
{
"status": "affected",
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},
{
"product": "Windows Server, version 1903 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
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]
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],
"descriptions": [
{
"lang": "en",
"value": "A remote code execution vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles a specially-crafted multi-master font - Adobe Type 1 PostScript format.For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely, aka 'Adobe Font Manager Library Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0938."
}
],
"problemTypes": [
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"descriptions": [
{
"description": "Remote Code Execution",
"lang": "en",
"type": "text"
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"dateUpdated": "2020-04-15T15:13:27.000Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "secure@microsoft.com",
"ID": "CVE-2020-1020",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
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{
"product_name": "Windows",
"version": {
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{
"version_value": "10 Version 1803 for 32-bit Systems"
},
{
"version_value": "10 Version 1803 for x64-based Systems"
},
{
"version_value": "10 Version 1803 for ARM64-based Systems"
},
{
"version_value": "10 Version 1809 for 32-bit Systems"
},
{
"version_value": "10 Version 1809 for x64-based Systems"
},
{
"version_value": "10 Version 1809 for ARM64-based Systems"
},
{
"version_value": "10 Version 1709 for 32-bit Systems"
},
{
"version_value": "10 Version 1709 for x64-based Systems"
},
{
"version_value": "10 Version 1709 for ARM64-based Systems"
},
{
"version_value": "10 for 32-bit Systems"
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{
"version_value": "10 for x64-based Systems"
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{
"version_value": "10 Version 1607 for 32-bit Systems"
},
{
"version_value": "10 Version 1607 for x64-based Systems"
},
{
"version_value": "7 for 32-bit Systems Service Pack 1"
},
{
"version_value": "7 for x64-based Systems Service Pack 1"
},
{
"version_value": "8.1 for 32-bit systems"
},
{
"version_value": "8.1 for x64-based systems"
},
{
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},
{
"product_name": "Windows Server",
"version": {
"version_data": [
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{
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{
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{
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{
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},
{
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},
{
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{
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},
{
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{
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}
},
{
"product_name": "Windows 10 Version 1909 for 32-bit Systems",
"version": {
"version_data": [
{
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}
]
}
},
{
"product_name": "Windows 10 Version 1909 for x64-based Systems",
"version": {
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}
]
}
},
{
"product_name": "Windows 10 Version 1909 for ARM64-based Systems",
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},
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}
},
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}
},
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}
},
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},
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]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A remote code execution vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles a specially-crafted multi-master font - Adobe Type 1 PostScript format.For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely, aka 'Adobe Font Manager Library Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0938."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Remote Code Execution"
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},
"references": {
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{
"name": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020",
"refsource": "MISC",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020"
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},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2020-1020",
"datePublished": "2020-04-15T15:13:27.000Z",
"dateReserved": "2019-11-04T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:46.197Z",
"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": 0.65037,
"percentile": 0.99254
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.65037,
"percentile": 0.99253
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.65037,
"percentile": 0.99252
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.65037,
"percentile": 0.99251
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2020-1020",
"cwes": [
"CWE-787"
],
"dateAdded": "2021-11-03",
"dueDate": "2022-05-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-1020",
"product": "Windows",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Microsoft Windows Adobe Font Manager Library contains an unspecified vulnerability when handling specially crafted multi-master fonts (Adobe Type 1 PostScript format) that allows for remote code execution for all systems except Windows 10. For systems running Windows 10, an attacker who successfully exploited the vulnerability could execute code in an AppContainer sandbox context with limited privileges and capabilities.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft Windows Adobe Font Manager Library Remote Code Execution Vulnerability"
}