CVE-2021-1782

CVE-2021-1782 is a high-severity (CVSS 7.0) vulnerability in Apple Multiple Products. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by November 17, 2021. CISA does not currently list it as used in ransomware campaigns. Apple has 96 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

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

• https://support.apple.com/en-us/HT212146
• https://support.apple.com/en-us/HT212147
• https://support.apple.com/en-us/HT212148
• https://support.apple.com/en-us/HT212149
• https://support.apple.com/en-us/HT212146
• https://support.apple.com/en-us/HT212147
• https://support.apple.com/en-us/HT212148
• https://support.apple.com/en-us/HT212149