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 / Internet Explorer 11
Default status: Not specified
- affected: 1.0.0 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
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": 0.24188,
"percentile": 0.97883
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.24188,
"percentile": 0.9787
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.24188,
"percentile": 0.97867
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.24188,
"percentile": 0.97866
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.24188,
"percentile": 0.97866
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.24188,
"percentile": 0.97863
}06 Nov 2026, 06:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T06:32:01.264Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1380"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/163056/Internet-Explorer-jscript9.dll-Memory-Corruption.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2020-1380",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T19:25:06.459464Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2021-11-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1380"
},
"type": "kev"
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}
],
"problemTypes": [
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"description": "CWE-787 Out-of-bounds Write",
"lang": "en",
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"dateUpdated": "2025-10-21T23:35:37.973Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"references": [
{
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"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1380"
}
],
"timeline": [
{
"lang": "en",
"time": "2021-11-03T00:00:00.000Z",
"value": "CVE-2020-1380 added to CISA KEV"
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],
"title": "CISA ADP Vulnrichment"
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],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*"
],
"platforms": [
"Windows 10 Version 1803 for 32-bit Systems",
"Windows 10 Version 1803 for x64-based Systems",
"Windows 10 Version 1803 for ARM64-based Systems",
"Windows 10 Version 1809 for 32-bit Systems",
"Windows 10 Version 1809 for x64-based Systems",
"Windows 10 Version 1809 for ARM64-based Systems",
"Windows Server 2019",
"Windows 10 Version 1909 for 32-bit Systems",
"Windows 10 Version 1909 for x64-based Systems",
"Windows 10 Version 1909 for ARM64-based Systems",
"Windows 10 Version 1709 for 32-bit Systems",
"Windows 10 Version 1709 for x64-based Systems",
"Windows 10 Version 1709 for ARM64-based Systems",
"Windows 10 Version 1903 for 32-bit Systems",
"Windows 10 Version 1903 for x64-based Systems",
"Windows 10 Version 1903 for ARM64-based Systems",
"Windows 10 Version 2004 for 32-bit Systems",
"Windows 10 Version 2004 for ARM64-based Systems",
"Windows 10 Version 2004 for x64-based Systems",
"Windows 10 for 32-bit Systems",
"Windows 10 for x64-based Systems",
"Windows 10 Version 1607 for 32-bit Systems",
"Windows 10 Version 1607 for x64-based Systems",
"Windows Server 2016",
"Windows 7 for 32-bit Systems Service Pack 1",
"Windows 7 for x64-based Systems Service Pack 1",
"Windows 8.1 for 32-bit systems",
"Windows 8.1 for x64-based systems",
"Windows RT 8.1",
"Windows Server 2008 R2 for x64-based Systems Service Pack 1",
"Windows Server 2012",
"Windows Server 2012 R2"
],
"product": "Internet Explorer 11",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "1.0.0",
"versionType": "custom"
}
]
}
],
"datePublic": "2020-08-11T07:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.\nIn a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the IE rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.\nThe security update addresses the vulnerability by modifying how the scripting engine handles objects in memory."
}
],
"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": [
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"value": "GENERAL"
}
]
}
],
"problemTypes": [
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{
"description": "Remote Code Execution",
"lang": "en-US",
"type": "Impact"
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]
}
],
"providerMetadata": {
"dateUpdated": "2024-05-29T16:32:47.208Z",
"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-2020-1380"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://packetstormsecurity.com/files/163056/Internet-Explorer-jscript9.dll-Memory-Corruption.html"
}
],
"title": "Scripting Engine Memory Corruption Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2020-1380",
"datePublished": "2020-08-17T19:13:00.000Z",
"dateReserved": "2019-11-04T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:37.973Z",
"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": 0.24188,
"percentile": 0.97862
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.24188,
"percentile": 0.9786
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.24188,
"percentile": 0.97857
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.24188,
"percentile": 0.97854
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2020-1380",
"cwes": [
"CWE-787"
],
"dateAdded": "2021-11-03",
"dueDate": "2022-05-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-1380",
"product": "Internet Explorer",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Microsoft Internet Explorer contains a memory corruption vulnerability which can allow for remote code execution in the context of the current user.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability"
}