CVE-2021-1782

HighCVSS 7.0/10Known exploited (CISA KEV)Last modified Jun 17, 2026

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..

Metrics

CVSS 3.1 7.0/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-667

Affected software

VendorProductVersions
AppleiOS and iPadOS>= unspecified, < 14.4
ApplemacOS>= unspecified, < 11.2
ApplemacOS>= unspecified, < 7.3
ApplemacOS>= unspecified, < 14.4

References

Timeline

Published
Apr 2, 2021
Last modified
Jun 17, 2026
Added to CISA KEV
Nov 3, 2021
NVD status
Analyzed

Related CVEs from 2021

CVE-2021-17837.8An access issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina,CVE-2021-17847.5A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks. This issue is fixed in macOS Big Sur 11CVE-2021-17857.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 CataCVE-2021-17865.5A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, SeCVE-2021-17877.8Multiple issues were addressed with improved logic. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security UCVE-2021-17888.8A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 CaCVE-2021-17898.8A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 CatalCVE-2021-17907.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 CataCVE-2021-17915.5An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issCVE-2021-17928.8An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 CatalCVE-2021-17937.8This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security UpdateCVE-2021-17949.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.4 and iPadOS 14.4. A remote attacker may b
CVE-2021-1782: High severity, CVSS 7.0 | Vulnix