CVE-2020-3855

An access issue was addressed with improved access restrictions. This issue is fixed in macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra. A malicious application may be able to overwrite arbitrary files.

• https://support.apple.com/en-us/HT210919Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT210919Release Notes, Vendor Advisory

Published

Oct 27, 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.

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• CVE-2020-3851A use after free issue was addressed with improved memory ma…7.8
• CVE-2020-3852A logic issue was addressed with improved validation. This i…5.3
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• CVE-2020-3854A memory corruption issue was addressed with improved memory…7.8
• CVE-2020-3856A memory corruption issue was addressed with improved input …7.8
• CVE-2020-3857A memory corruption issue was addressed with improved memory…7.8
• CVE-2020-3858A memory corruption issue was addressed with improved memory…7.8
• CVE-2020-3859An inconsistent user interface issue was addressed with impr…2.4
• CVE-2020-3860A memory corruption issue was addressed with improved input …7.8
• CVE-2020-3861The issue was addressed with improved permissions logic. Thi…7.1