CVE-2021-30869
Apple iOS, iPadOS, and macOS Type Confusion Vulnerability
- High 7.8
- Exploited: added to CISA KEV 3 Nov 2021
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.
Key facts
- Published
- 24 Aug 2021
- Last changed
- 21 Oct 2025
- Assigned by
- apple
- KEV added
- 3 Nov 2021
- KEV fix due
- 17 Nov 2021
- EPSS
- 4.169% likely to be exploited in the next 30 days, higher than 91.053% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS and iPadOS |
|
| Apple | macOS |
|
| Apple | macOS |
|
| Apple | macOS |
|
Timeline
- 24 Aug 2021 Published
- 3 Nov 2021 CVE-2021-30869 added to CISA KEV
- 3 Nov 2021 Added to the CISA KEV catalogue