CVE-2020-9851

Name: CVE-2020-9851
Creator: NVD / NIST
Published: 2020-06-09T17:15:15.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2020-9851 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An access issue was addressed with improved access restrictions. This issue is fixed in macOS Catalina 10.15.5. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

An access issue was addressed with improved access restrictions. This issue is fixed in macOS Catalina 10.15.5. A malicious application may be able to modify protected parts of 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

0.60%

44.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.15.5

References

https://support.apple.com/HT211170Vendor Advisory
https://support.apple.com/HT211170Vendor Advisory

Timeline

Published: Jun 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9851?

An access issue was addressed with improved access restrictions. This issue is fixed in macOS Catalina 10.15.5. A malicious application may be able to modify protected parts of the file system.

How severe is CVE-2020-9851?

CVE-2020-9851 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9851?

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-2020-9851?

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

Scan your code now

Source: NVD / NIST