Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-1782

CVE-2021-1782HIGH

Apple Multiple Products

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   H   L   N  U  H  H  H    7.0   .0222   82.1   YES

AFFECTED
  Product         Versions       Fixed
  iOS and iPadOS  unspecified –  —
  macOS           unspecified –  —
  macOS           unspecified –  —
  macOS           unspecified –  —

TIMELINE
  Dec 8   Reserved by apple
  Apr 2   Published (CNA: apple)
  Nov 3   Added to CISA KEV, remediation due 2021-11-17

CWE-667 · CNA: apple · CVSS v3.1 · 5 references · KEV due November 17, 2021

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..

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
December 8, 2020	Reserved	Reserved by apple
April 2, 2021	Published	Published (CNA: apple)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2021-11-17

Affected

Affected products and packages — 4 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Apple	iOS and iPadOS	—	unspecified	—
Apple	macOS	—	unspecified	—
Apple	macOS	—	unspecified	—
Apple	macOS	—	unspecified	—

Weaknesses

CWE-667

References (5)

https://support.apple.com/en-us/HT212146 [x_refsource_MISC]
https://support.apple.com/en-us/HT212147 [x_refsource_MISC]
https://support.apple.com/en-us/HT212148 [x_refsource_MISC]
https://support.apple.com/en-us/HT212149 [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782 [government-resource]

Authoritative record: CVE-2021-1782 at cve.org

Vendors: apple

Weaknesses: CWE-667

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-1782 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.