CVE-2020-9828

Name: CVE-2020-9828
Creator: NVD / NIST
Published: 2020-10-22T18:15:13.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.16%

Last modified Jun 17, 2026

CVE-2020-9828 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.4. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.4. A remote attacker may be able to leak sensitive user information.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.16%

63.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.15.4

References

https://support.apple.com/kb/HT211100Vendor Advisory
https://support.apple.com/kb/HT211100Vendor Advisory

Timeline

Published: Oct 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9828?

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.4. A remote attacker may be able to leak sensitive user information.

How severe is CVE-2020-9828?

CVE-2020-9828 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9828?

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-2020-9828?

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

Scan your code now

Source: NVD / NIST