CVEvulnerability

CVE-2021-1782

7.0 HIGH Known exploited Published 2021-04-02 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Apple Multiple Products Race Condition Vulnerability — Apple Multiple Products

Apple iOS, iPadOs, macOS, watchOS, and tvOS contain a race condition vulnerability that may allow a malicious application to elevate privileges.

Added to KEV
2021-11-03
Remediation due
2021-11-17
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-1782
Status
Analyzed
Published
2021-04-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
Weaknesses
CWE-667

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..

Affected configurations

• apple ipados (< 14.4) • apple iphone os (< 14.4) • apple mac os x (>= 10.14 < 10.14.6) • apple mac os x (>= 10.15 < 10.15.7) • apple mac os x 10.14.6 • apple mac os x 10.15.7 • apple macos (>= 11.0 < 11.2) • apple tvos (< 14.4) • apple watchos (< 7.3)

Related

Weakness · CWE (1)

  • CWE-667 Improper Locking weakness

Referenced by CWE · observed example (3)

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness
  • CWE-662 Improper Synchronization weakness
  • CWE-667 Improper Locking weakness

References