CVE-2021-1884

A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. A remote attacker may be able to cause a denial of service.

• CWE-362

• https://support.apple.com/en-us/HT212317Vendor Advisory
• https://support.apple.com/en-us/HT212323Vendor Advisory
• https://support.apple.com/en-us/HT212324Vendor Advisory
• https://support.apple.com/en-us/HT212325Vendor Advisory
• https://support.apple.com/en-us/HT212530Vendor Advisory
• https://support.apple.com/en-us/HT212531Vendor Advisory
• https://support.apple.com/en-us/HT212317Vendor Advisory
• https://support.apple.com/en-us/HT212323Vendor Advisory
• https://support.apple.com/en-us/HT212324Vendor Advisory
• https://support.apple.com/en-us/HT212325Vendor Advisory
• https://support.apple.com/en-us/HT212530Vendor Advisory
• https://support.apple.com/en-us/HT212531Vendor Advisory

Published

Sep 8, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• CVE-2021-1883This issue was addressed with improved checks. This issue is…5.5
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• CVE-2021-1886Incorrect handling of pointers in trusted application key im…7.8
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• CVE-2021-1890Improper length check of public exponent in RSA import key f…7.8