Is CVE-2020-1020 being actively exploited?

Yes. CVE-2020-1020 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on November 3, 2021.

What is the CVSS score for CVE-2020-1020?

CVE-2020-1020 has a CVSS 3.1 base score of 8.8 (HIGH).

CVE-2020-1020

HIGH · CVSS 8.8CISA KEV: actively exploitedEPSS 65.0%EU EUVD: exploited

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.

Key facts

CVSS score: 8.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 65.0% (99th percentile)
In CISA KEV: Yes, added November 3, 2021
In EU EUVD: Yes (EUVD-2020-11916)
Published: April 15, 2020
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows Adobe Font Manager Library Remote Code Execution Vulnerability

Added to the KEV catalog on November 3, 2021; federal remediation due May 3, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-11916 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1507
microsoft / windows 10 1507
microsoft / windows 10 1607
microsoft / windows 10 1709
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1909
microsoft / windows 10 1909
microsoft / windows 10 1909
microsoft / windows 7
microsoft / windows 8.1
microsoft / windows rt 8.1
microsoft / windows server 1903
microsoft / windows server 1909
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2012
microsoft / windows server 2012
microsoft / windows server 2016
microsoft / windows server 2019

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020(Patch, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1020(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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