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CVE-2020-1020

HighPublished

Microsoft Windows Adobe Font Manager Library Remote Code Execution Vulnerability

Published: Apr 15, 2020
Updated: Oct 21, 2025
Assigning CNA: microsoft
Evidence observed: Nov 3, 2021

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS probability estimate

65.0%

High · next 30 days

Percentile: 99.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

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.

Sources

CVE-2020-1020Exploit
Windows Font Driver Type 1 VToHOrigin stack corruption
CVE-2020-1020-ExploitExploit
Local privilege escalation exploit for CVE-2020-1020 targeting Windows 7/8/8.1 x64 via Type1 Font Pool Overflow.

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