CVE-2020-1436

Name: CVE-2020-1436
Creator: NVD / NIST
Published: 2020-07-14T23:15:19.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 21.37%

Last modified Jun 17, 2026

CVE-2020-1436 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted fonts.For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely, aka 'Windows Font Library Remote Code Execution Vulnerability'.. EPSS estimates a 21.37% chance of exploitation in the next 30 days.

Description

A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted fonts.For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely, aka 'Windows Font Library Remote Code Execution Vulnerability'.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

21.37%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions	Update
Microsoft	Windows 10	All versions	—
Microsoft	Windows 10	1607	—
Microsoft	Windows 10	1709	—
Microsoft	Windows 10	1803	—
Microsoft	Windows 10	1809	—
Microsoft	Windows 10	1903	—
Microsoft	Windows 10	1909	—
Microsoft	Windows 10	2004	—
Microsoft	Windows 7	All versions	Sp1
Microsoft	Windows 8.1	All versions	—
Microsoft	Windows Rt 8.1	All versions	—
Microsoft	Windows Server 2008	All versions	Sp2
Microsoft	Windows Server 2008	r2	Sp1
Microsoft	Windows Server 2012	All versions	—
Microsoft	Windows Server 2012	r2	—
Microsoft	Windows Server 2016	All versions	—
Microsoft	Windows Server 2016	1903	—
Microsoft	Windows Server 2016	1909	—
Microsoft	Windows Server 2016	2004	—
Microsoft	Windows Server 2019	All versions	—

References

http://www.openwall.com/lists/oss-security/2020/08/25/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/08/25/5Mailing List, Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1436Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-877/Third Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2020/08/25/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/08/25/5Mailing List, Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1436Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-877/Third Party Advisory, VDB Entry

Timeline

Published: Jul 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-1436?

How severe is CVE-2020-1436?

CVE-2020-1436 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 21.37% probability of exploitation in the next 30 days.

How do I fix CVE-2020-1436?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-1436?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST