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CVE-2021-1782

7.0
HIGHCVSS v3.1 Base Score
5.88%
LOW RiskEPSS (91st percentile)
KEV

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..

Published: 4/2/2021
Modified: 10/23/2025
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Apple Multiple Products Race Condition Vulnerability

Vendor / Product:

Apple Multiple Products

Required Action:

Apply updates per vendor instructions.

Due Date: 11/17/2021(OVERDUE)
Added to KEV:

11/3/2021

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2021-1782

Vulnerability Summary

CVSS v3 Score

7HIGH

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

CVSS v2 Score

6.9

AV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS Score (Exploitation Probability)

5.88%LOW Exploitation Risk
91st percentile

This vulnerability has a 5.88% probability of being exploited in the next 30 days, ranking higher than 91% of all scored CVEs.

CWE Classification

Related Vulnerabilities

Same Weakness Type(CWE-667)

Similar SeverityHIGH