CVE-2021-30753

Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. An out-of-bounds read was addressed with improved input validation.

• CWE-125

• https://support.apple.com/en-us/HT212528Vendor Advisory
• https://support.apple.com/en-us/HT212529Vendor Advisory
• https://support.apple.com/en-us/HT212532Vendor Advisory
• https://support.apple.com/en-us/HT212533Vendor Advisory
• https://support.apple.com/en-us/HT212528Vendor Advisory
• https://support.apple.com/en-us/HT212529Vendor Advisory
• https://support.apple.com/en-us/HT212532Vendor Advisory
• https://support.apple.com/en-us/HT212533Vendor 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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• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-30746An out-of-bounds read was addressed with improved input vali…5.5
• CVE-2021-30748A memory corruption issue was addressed with improved state …7.8
• CVE-2021-30749Multiple memory corruption issues were addressed with improv…8.8
• CVE-2021-30750The issue was addressed with improved permissions logic. Thi…5.5
• CVE-2021-30751This issue was addressed with improved data protection. This…5.5
• CVE-2021-30752Processing a maliciously crafted image may lead to arbitrary…7.8
• CVE-2021-30755Processing a maliciously crafted font may result in the disc…6.5
• CVE-2021-30756A local attacker may be able to view Now Playing information…5.5
• CVE-2021-30757This issue was addressed by enabling hardened runtime. This …5.5
• CVE-2021-30758A type confusion issue was addressed with improved state han…8.8
• CVE-2021-30759A stack overflow was addressed with improved input validatio…7.8
• CVE-2021-30760An integer overflow was addressed through improved input val…7.8