CVE-2020-9856

Name: CVE-2020-9856
Creator: NVD / NIST
Published: 2020-06-09T17:15:15.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.39%

Last modified Jun 17, 2026

CVE-2020-9856 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. This issue was addressed with improved checks. This issue is fixed in macOS Catalina 10.15.5. EPSS estimates a 1.39% chance of exploitation in the next 30 days.

Description

This issue was addressed with improved checks. This issue is fixed in macOS Catalina 10.15.5. An application may be able to gain elevated privileges.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.39%

68.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	>= 10.13, < 10.13.6
Apple	Mac Os X	>= 10.14, < 10.14.6
Apple	Mac Os X	>= 10.15, < 10.15.5
Apple	Mac Os X	10.13.6
Apple	Mac Os X	10.14.6

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-2020-9856?

This issue was addressed with improved checks. This issue is fixed in macOS Catalina 10.15.5. An application may be able to gain elevated privileges.

How severe is CVE-2020-9856?

CVE-2020-9856 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9856?

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-2020-9856?

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

Scan your code now

Source: NVD / NIST