High 8.8Known exploited (CISA KEV)Published Apr 15, 2020

CVE-2020-1020A 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…

Updated under an hour ago (Oct 26, 2026, 6:30 PM ET)

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It affects Microsoft Windows and 25 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.

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Every CVE for Microsoft Windows

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 65.04% (percentile 99)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft Windows microsoft:windows (from the name)	10 Version 1803 for 32-bit Systems; 10 Version 1803 for x64-based Systems; 10 Version 1803 for ARM64-based Systems; 10 Version 1809 for 32-bit Systems; 10 Version 1809 for x64-based Systems; 10 Version 1809 for ARM64-based Systems; 10 Version 1709 for 32-bit Systems; 10 Version 1709 for x64-based Systems; and 10 more ranges	CNA record
Microsoft Windows Server microsoft:windows_server (from the name)	version 1803 (Core Installation); 2019; 2019 (Core installation); 2016; 2016 (Core installation); 2008 for 32-bit Systems Service Pack 2; 2008 for 32-bit Systems Service Pack 2 (Core installation); 2008 for Itanium-Based Systems Service Pack 2; and 9 more ranges	CNA record
Microsoft Windows 10 Version 1909 for 32-bit Systems microsoft:windows_10_version_1909_for_32_bit_systems (from the name)	unspecified	CNA record
Microsoft Windows 10 Version 1909 for x64-based Systems microsoft:windows_10_version_1909_for_x64_based_systems (from the name)	unspecified	CNA record
Microsoft Windows 10 Version 1909 for ARM64-based Systems microsoft:windows_10_version_1909_for_arm64_based_systems (from the name)	unspecified	CNA record
Microsoft Windows Server, version 1909 (Server Core installation) microsoft:windows_server_version_1909_server_core_installation (from the name)	unspecified	CNA record
Microsoft Windows 10 Version 1903 for 32-bit Systems microsoft:windows_10_version_1903_for_32_bit_systems (from the name)	unspecified	CNA record
Microsoft Windows 10 Version 1903 for x64-based Systems microsoft:windows_10_version_1903_for_x64_based_systems (from the name)	unspecified	CNA record
Microsoft Windows 10 Version 1903 for ARM64-based Systems microsoft:windows_10_version_1903_for_arm64_based_systems (from the name)	unspecified	CNA record
Microsoft Windows Server, version 1903 (Server Core installation) microsoft:windows_server_version_1903_server_core_installation (from the name)	unspecified	CNA record
1–10 of 26

References

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020	x-refsource-misc, patch, vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1020	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.