CVE-2021-30789

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.

• CWE-125

• https://support.apple.com/en-us/HT212600Vendor Advisory
• https://support.apple.com/en-us/HT212601Vendor Advisory
• https://support.apple.com/en-us/HT212602Vendor Advisory
• https://support.apple.com/en-us/HT212604Vendor Advisory
• https://support.apple.com/en-us/HT212605Vendor Advisory
• https://support.apple.com/en-us/HT212600Vendor Advisory
• https://support.apple.com/en-us/HT212601Vendor Advisory
• https://support.apple.com/en-us/HT212602Vendor Advisory
• https://support.apple.com/en-us/HT212604Vendor Advisory
• https://support.apple.com/en-us/HT212605Vendor 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.
• 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-2021-30783An access issue was addressed with improved access restricti…6.5
• CVE-2021-30784Multiple issues were addressed with improved logic. This iss…7.8
• CVE-2021-30785A buffer overflow was addressed with improved bounds checkin…7.8
• CVE-2021-30786A race condition was addressed with improved state handling.…7
• CVE-2021-30787This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-30788This issue was addressed with improved checks. This issue is…7.1
• CVE-2021-30790An information disclosure issue was addressed by removing th…7.8
• CVE-2021-30791An out-of-bounds read was addressed with improved bounds che…5.5
• CVE-2021-30792An out-of-bounds write was addressed with improved input val…7.8
• CVE-2021-30793A logic issue was addressed with improved state management. …9.8
• CVE-2021-30795A use after free issue was addressed with improved memory ma…8.8
• CVE-2021-30796A logic issue was addressed with improved validation. This i…6.5