CVE-2021-1844

A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3. Processing maliciously crafted web content may lead to arbitrary code execution.

• CWE-787

• http://seclists.org/fulldisclosure/2021/Apr/55Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
• https://support.apple.com/en-us/HT212220Vendor Advisory
• https://support.apple.com/en-us/HT212221Vendor Advisory
• https://support.apple.com/en-us/HT212222Vendor Advisory
• https://support.apple.com/en-us/HT212223Vendor Advisory
• https://support.apple.com/kb/HT212323Vendor Advisory
• https://www.debian.org/security/2021/dsa-4923Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Apr/55Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
• https://support.apple.com/en-us/HT212220Vendor Advisory
• https://support.apple.com/en-us/HT212221Vendor Advisory
• https://support.apple.com/en-us/HT212222Vendor Advisory
• https://support.apple.com/en-us/HT212223Vendor Advisory
• https://support.apple.com/kb/HT212323Vendor Advisory
• https://www.debian.org/security/2021/dsa-4923Third Party Advisory

Published

Apr 2, 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-2021-1838This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-1839The issue was addressed with improved permissions logic. Thi…7.8
• CVE-2021-1840A memory corruption issue was addressed with improved valida…7.8
• CVE-2021-1841A malicious application may be able to execute arbitrary cod…7.8
• CVE-2021-1842Rejected reason: This candidate is unused by its CNA.
• CVE-2021-1843This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-1846Processing a maliciously crafted audio file may disclose res…5.5
• CVE-2021-1847A memory corruption issue was addressed with improved valida…7.8
• CVE-2021-1848The issue was addressed with improved UI handling. This issu…5.5
• CVE-2021-1849An issue in code signature validation was addressed with imp…7.5
• CVE-2021-1851A logic issue was addressed with improved state management. …8.8
• CVE-2021-1852An out-of-bounds read was addressed with improved input vali…5.5