CVE-2020-9991

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service.

• http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
• https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
• https://support.apple.com/en-us/HT211843Vendor Advisory
• https://support.apple.com/en-us/HT211844Vendor Advisory
• https://support.apple.com/en-us/HT211847Vendor Advisory
• https://support.apple.com/en-us/HT211850Vendor Advisory
• https://support.apple.com/en-us/HT211931Vendor Advisory
• https://support.apple.com/kb/HT211846Vendor Advisory
• http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
• https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
• https://support.apple.com/en-us/HT211843Vendor Advisory
• https://support.apple.com/en-us/HT211844Vendor Advisory
• https://support.apple.com/en-us/HT211847Vendor Advisory
• https://support.apple.com/en-us/HT211850Vendor Advisory
• https://support.apple.com/en-us/HT211931Vendor Advisory
• https://support.apple.com/kb/HT211846Vendor Advisory

Published

Dec 8, 2020

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.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-9985A buffer overflow issue was addressed with improved memory h…7.8
• CVE-2020-9986A file access issue existed with certain home folder files. …3.3
• CVE-2020-9987An inconsistent user interface issue was addressed with impr…4.3
• CVE-2020-9988The issue was addressed with improved deletion. This issue i…5.5
• CVE-2020-9989The issue was addressed with improved deletion. This issue i…5.5
• CVE-2020-9990A race condition was addressed with additional validation. T…7.8
• CVE-2020-9992This issue was addressed by encrypting communications over t…7.8
• CVE-2020-9993The issue was addressed with improved UI handling. This issu…4.3
• CVE-2020-9994A path handling issue was addressed with improved validation…7.1
• CVE-2020-9995An issue existed in the parsing of URLs. This issue was addr…6.1
• CVE-2020-9996A use after free issue was addressed with improved memory ma…7.8
• CVE-2020-9997An information disclosure issue was addressed with improved …5.5