CVE-2020-9963

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-08 · updated 2026-06-17

Description

The issue was addressed with improved handling of icon caches. This issue is fixed in macOS Big Sur 11.0.1, iOS 14.0 and iPadOS 14.0. A malicious app may be able to determine the existence of files on the computer.

Affected products

Apple iPadOS: before 14.0 — fixed in 14.0
Apple Iphone Os: before 14.0 — fixed in 14.0
macOS: before 11.0.1 — fixed in 11.0.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.0; Apple Iphone Os 14.0; macOS 11.0.1. Check the vendor advisory for mitigations.

References

http://seclists.org/fulldisclosure/2020/Dec/32
https://support.apple.com/en-us/HT211850
https://support.apple.com/en-us/HT211931
http://seclists.org/fulldisclosure/2020/Dec/32
https://support.apple.com/en-us/HT211850
https://support.apple.com/en-us/HT211931

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