CVE-2020-3871

Name: CVE-2020-3871
Creator: NVD / NIST
Published: 2020-02-27T21:15:18.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2020-3871 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Catalina 10.15.3. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Catalina 10.15.3. An application may be able to execute arbitrary code with kernel privileges.

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

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.15.3

References

https://support.apple.com/HT210919Release Notes, Vendor Advisory
https://support.apple.com/HT210919Release Notes, Vendor Advisory

Timeline

Published: Feb 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3871?

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Catalina 10.15.3. An application may be able to execute arbitrary code with kernel privileges.

How severe is CVE-2020-3871?

CVE-2020-3871 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3871?

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-2020-3871?

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

Scan your code now

Source: NVD / NIST