CVE-2020-9926

Name: CVE-2020-9926
Creator: NVD / NIST
Published: 2021-04-02T18:15:18.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.01%

Last modified Jun 17, 2026

CVE-2020-9926 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.6 and iPadOS 13.6, tvOS 13.4.8, watchOS 6.2.8, iCloud for Windows 7.20, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. EPSS estimates a 1.01% chance of exploitation in the next 30 days.

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.6 and iPadOS 13.6, tvOS 13.4.8, watchOS 6.2.8, iCloud for Windows 7.20, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution.

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

1.01%

58.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.20
Apple	Ipados	< 13.6
Apple	Iphone Os	< 13.6
Apple	Mac Os X	< 10.13.6
Apple	Mac Os X	>= 10.14, < 10.14.6
Apple	Mac Os X	>= 10.15, < 10.15.6
Apple	Mac Os X	10.13.6
Apple	Mac Os X	10.14.6
Apple	Tvos	< 13.4.8
Apple	Watchos	< 6.2.8

References

https://support.apple.com/en-us/HT211288Vendor Advisory
https://support.apple.com/en-us/HT211289Vendor Advisory
https://support.apple.com/en-us/HT211290Vendor Advisory
https://support.apple.com/en-us/HT211291Vendor Advisory
https://support.apple.com/en-us/HT211295Vendor Advisory
https://support.apple.com/en-us/HT211288Vendor Advisory
https://support.apple.com/en-us/HT211289Vendor Advisory
https://support.apple.com/en-us/HT211290Vendor Advisory
https://support.apple.com/en-us/HT211291Vendor Advisory
https://support.apple.com/en-us/HT211295Vendor Advisory

Timeline

Published: Apr 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9926?

How severe is CVE-2020-9926?

CVE-2020-9926 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.01% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9926?

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-2020-9926?

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

Scan your code now

Source: NVD / NIST