CVE-2021-30869
Apple iOS, iPadOS, and macOS Type Confusion Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 November 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 4.13% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 November 2021 · due 17 November 2021
- Weakness
- CWE-843
- Affected
- apple/ipados · apple/iphone os · apple/mac os x · apple/macos
- Source
- product-security@apple.com
EPSS 4.1% since 30 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-30869
References
- https://support.apple.com/en-us/HT212146Vendor Advisory
- https://support.apple.com/en-us/HT212147Vendor Advisory
- https://support.apple.com/en-us/HT212824Vendor Advisory
- https://support.apple.com/en-us/HT212825Vendor Advisory
- https://support.apple.com/en-us/HT212146Vendor Advisory
- https://support.apple.com/en-us/HT212147Vendor Advisory
- https://support.apple.com/en-us/HT212824Vendor Advisory
- https://support.apple.com/en-us/HT212825Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30869US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.