A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, iOS 14.2 and iPadOS 14.2. Opening a maliciously crafted file may lead to unexpected application termination or arbitrary code execution.
http://seclists.org/fulldisclosure/2020/Dec/32
http://seclists.org/fulldisclosure/2020/Dec/26
https://support.apple.com/kb/HT212011
https://support.apple.com/kb/HT211930
https://support.apple.com/en-us/HT211931
https://support.apple.com/en-us/HT211929
Source: Mitre, NVD
Published: 2020-12-08
Updated: 2023-01-09
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00559