How severe is CVE-2020-1020?

CVE-2020-1020 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-1020 being actively exploited?

Yes. CVE-2020-1020 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-1020?

CVE-2020-1020 primarily affects Microsoft Windows 10 1507. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-1020?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-1020 have an EU (EUVD) identifier?

Yes. CVE-2020-1020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-11916. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2020-1020 published?

CVE-2020-1020 was published on 2020-04-15 and last updated on 2026-06-17.

CVE-2020-1020

CVE-2020-1020 is a high-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 65% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2020-11916
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-787
Affected product: Microsoft Windows 10 1507
Published: 2020-04-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-1020?: 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.
How severe is CVE-2020-1020?: CVE-2020-1020 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-1020 being actively exploited?: Yes. CVE-2020-1020 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-1020?: CVE-2020-1020 primarily affects Microsoft Windows 10 1507. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-1020?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-1020 have an EU (EUVD) identifier?: Yes. CVE-2020-1020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-11916. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2020-1020 published?: CVE-2020-1020 was published on 2020-04-15 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

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