CVE-2020-27896

Name: CVE-2020-27896
Creator: NVD / NIST
Published: 2020-12-08T22:15:18.647+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.43%

Last modified Jun 17, 2026

CVE-2020-27896 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.0.1. EPSS estimates a 1.43% chance of exploitation in the next 30 days.

Description

A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.0.1. A remote attacker may be able to modify the file system.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.43%

69.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	>= 10.14.0, < 10.14.6
Apple	Mac Os X	>= 10.15.0, < 10.15.7
Apple	Mac Os X	10.14.6
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.0.1

References

http://seclists.org/fulldisclosure/2020/Dec/26Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/kb/HT212011Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/26Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/kb/HT212011Vendor Advisory

Timeline

Published: Dec 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27896?

A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.0.1. A remote attacker may be able to modify the file system.

How severe is CVE-2020-27896?

CVE-2020-27896 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27896?

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-2020-27896?

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

Scan your code now

Source: NVD / NIST