CVE-2021-1782

Apple iOS and iPadOS, Apple macOS

Published 2 Apr 2021 · updated 17 Jun 2026 · Analyzed

7.0 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, with a remediation deadline of 17 Nov 2021 for US federal agencies.

Required action: Apply updates per vendor instructions.

Description

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..

References

support.apple.com/en-us/HT212146 · Release Notes, Vendor Advisory
support.apple.com/en-us/HT212147 · Release Notes, Vendor Advisory
support.apple.com/en-us/HT212148 · Release Notes, Vendor Advisory
support.apple.com/en-us/HT212149 · Release Notes, Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782 · US Government Resource