CVE-2020-27943

Name: CVE-2020-27943
Creator: NVD / NIST
Published: 2021-04-02T18:15:16.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.98%

Last modified Jun 17, 2026

CVE-2020-27943 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation. EPSS estimates a 0.98% chance of exploitation in the next 30 days.

Description

A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation. This issue is fixed in tvOS 14.3, iOS 14.3 and iPadOS 14.3, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.2. Processing a maliciously crafted font file may lead to arbitrary code execution.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.98%

57.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Apple	Ipad Os	< 14.3
Apple	Iphone Os	< 14.3
Apple	Macos	< 11.1.0
Apple	Tvos	< 14.3
Apple	Watchos	< 7.2

References

https://support.apple.com/en-us/HT212003Vendor Advisory
https://support.apple.com/en-us/HT212005Vendor Advisory
https://support.apple.com/en-us/HT212009Vendor Advisory
https://support.apple.com/en-us/HT212011Vendor Advisory
https://support.apple.com/en-us/HT212003Vendor Advisory
https://support.apple.com/en-us/HT212005Vendor Advisory
https://support.apple.com/en-us/HT212009Vendor Advisory
https://support.apple.com/en-us/HT212011Vendor Advisory

Timeline

Published: Apr 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27943?

How severe is CVE-2020-27943?

CVE-2020-27943 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27943?

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-2020-27943?

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

Scan your code now

Source: NVD / NIST