What it is
CVE-2020-1020 is an unauthenticated vulnerability affecting Microsoft Windows and 11 other products. A remote code execution vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2020-1020
Windows Remote Code Execution
Microsoft / Windows · 10 Version 1803 for 32-bit Systems
- Severity
- CVSS 8.8 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 65.0%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Microsoft / Windows 10 version 1803 for 32-bit systems.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Windows Remote Code Execution
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.
Vendor
Product
Affected
Status
Microsoft
Windows Server
2008 for Itanium-Based Systems Service Pack 2
Affected
Microsoft
Windows Server
2008 for x64-based Systems Service Pack 2
Affected
Microsoft
Windows Server
2008 for x64-based Systems Service Pack 2 (Core installation)
Affected
Microsoft
Windows Server
2008 R2 for Itanium-Based Systems Service Pack 1
Affected
Microsoft
Windows Server
2008 R2 for x64-based Systems Service Pack 1
Affected
Microsoft
Windows Server
2008 R2 for x64-based Systems Service Pack 1 (Core installation)
Affected
Microsoft
Windows Server
2012
Affected
Microsoft
Windows Server
2012 (Core installation)
Affected
Microsoft
Windows Server
2012 R2
Affected
Microsoft
Windows Server
2012 R2 (Core installation)
Affected
Microsoft
Windows 10 Version 1909 for 32-bit Systems
unspecified
Affected
Microsoft
Windows 10 Version 1909 for x64-based Systems
unspecified
Affected
Microsoft
Windows 10 Version 1909 for ARM64-based Systems
unspecified
Affected
Microsoft
Windows Server, version 1909 (Server Core installation)
unspecified
Affected
Microsoft
Windows 10 Version 1903 for 32-bit Systems
unspecified
Affected
Microsoft
Windows 10 Version 1903 for x64-based Systems
unspecified
Affected
Microsoft
Windows 10 Version 1903 for ARM64-based Systems
unspecified
Affected
Microsoft
Windows Server, version 1903 (Server Core installation)
unspecified
Affected
- Published
- 15 Apr 2020
- Exploitation Reported
- 03 Nov 2021
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
Tags
cisa
windows
microsoft
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2020-1020
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020 portal.msrc.microsoft.com · CVE Record https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CV...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2021-11-03 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
8.8
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
65.0%
Weaknesses
All CVSS Scores
CVSS v3.1
8.8
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2.0
6.8
Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P
Timeline
From disclosure to observed exploitation
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2020-1020
Free JSON includes basic KEV fields{
"cve_id": "CVE-2020-1020",
"confidence": "Confirmed",
"cvss_score": 8.8,
"cvss_estimated": false,
"epss_score": 0.65037,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
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