CVE-2021-30807
Published 2021-10-19 · Updated 2026-06-17 · Source product-security@apple.com
Summary
CVE-2021-30807 is a high-severity (CVSS 7.8) vulnerability in Apple Multiple Products. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by November 17, 2021. CISA does not currently list it as used in ransomware campaigns. Apple has 96 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 96 known-exploited Apple vulnerabilities →Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Apple — Multiple Products
Name: Apple Multiple Products Memory Corruption Vulnerability
Date added: 2021-11-03 · Due: 2021-11-17
Required action: Apply updates per vendor instructions.
References
- https://support.apple.com/en-us/HT212622
- https://support.apple.com/en-us/HT212623
- https://support.apple.com/en-us/HT212713
- https://support.apple.com/en-us/HT212622
- https://support.apple.com/en-us/HT212623
- https://support.apple.com/en-us/HT212713
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30807