CVE-2020-9936

Name: CVE-2020-9936
Creator: NVD / NIST
Published: 2020-10-16T17:15:17.7+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2020-9936 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8, iTunes 12.10.8 for Windows, iCloud for Windows 11.3, iCloud for Windows 7.20. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8, iTunes 12.10.8 for Windows, iCloud for Windows 11.3, iCloud for Windows 7.20. Processing a maliciously crafted image may lead to 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

1.27%

66.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.20
Apple	Icloud	>= 11.0, < 11.3
Apple	Itunes	< 12.10.8
Apple	Safari	< 13.1.2
Apple	Ipados	< 13.6
Apple	Iphone Os	< 13.6
Apple	Tvos	< 13.4.8
Apple	Watchos	< 6.2.8

References

https://support.apple.com/HT211288Release Notes, Vendor Advisory
https://support.apple.com/HT211289Release Notes, Vendor Advisory
https://support.apple.com/HT211290Release Notes, Vendor Advisory
https://support.apple.com/HT211291Release Notes, Vendor Advisory
https://support.apple.com/HT211293Release Notes, Vendor Advisory
https://support.apple.com/HT211294Release Notes, Vendor Advisory
https://support.apple.com/HT211295Release Notes, Vendor Advisory
https://support.apple.com/HT211288Release Notes, Vendor Advisory
https://support.apple.com/HT211289Release Notes, Vendor Advisory
https://support.apple.com/HT211290Release Notes, Vendor Advisory
https://support.apple.com/HT211291Release Notes, Vendor Advisory
https://support.apple.com/HT211293Release Notes, Vendor Advisory
https://support.apple.com/HT211294Release Notes, Vendor Advisory
https://support.apple.com/HT211295Release Notes, Vendor Advisory

Timeline

Published: Oct 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9936?

How severe is CVE-2020-9936?

CVE-2020-9936 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9936?

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-2020-9936?

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

Scan your code now

Source: NVD / NIST