CVE-2020-1020highunder attackCWE-787

CVE-2020-1020: high-severity vulnerability in Microsoft Windows

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83Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 65%
from disclosure to weapon421 days
Published on NVDApr 15
1st PoC+421d
CISA KEV+567d
Action required by CISAfederal deadline: 2022-05-03

Apply updates per vendor instructions.

In short

A flaw in Windows' Adobe Type Manager Library allows attackers to run malicious code remotely by sending a specially-crafted font file. If you open this malicious font, the attacker gains control of your computer.

Technical detail

CWE-787 (out-of-bounds write) in Adobe Type Manager Library's multi-master font parsing permits remote code execution via crafted Adobe Type 1 PostScript fonts. Attack vector is network/local (font delivery); pre-condition requires user interaction or system font processing; impact is arbitrary code execution with system privileges.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Microsoft · WindowsMicrosoft · Windows 10 Version 1903 for 32-bit SystemsMicrosoft · Windows 10 Version 1903 for ARM64-based SystemsMicrosoft · Windows 10 Version 1903 for x64-based SystemsMicrosoft · Windows 10 Version 1909 for 32-bit SystemsMicrosoft · Windows 10 Version 1909 for ARM64-based SystemsMicrosoft · Windows 10 Version 1909 for x64-based SystemsMicrosoft · Windows ServerMicrosoft · Windows Server, version 1903 (Server Core installation)Microsoft · Windows Server, version 1909 (Server Core installation)
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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